diff --git a/AUTHORING.md b/AUTHORING.md
index e21e185..b886611 100644
--- a/AUTHORING.md
+++ b/AUTHORING.md
@@ -47,22 +47,25 @@ Know this before writing anything:
 
 ### The container user
 - Run `gbrgames inspect-image -game <id>`. If the image is built around its own user (it declares
-  `USER`, or locks a home folder to a uid other than 1000), set `containerUser` to that `uid:gid`.
-  Example: ARK's image needs `25000:25000`.
+  `USER`, or locks a home folder to a uid other than 1000), set `containerUser` to that `uid:gid`, as
+  the inspector reports it.
 
 ### The startup command
 - Read settings under the names the agent gives them (see above). `${RCON_PORT}` when the setting is
   `RCONPort` silently ignores the owner's value; it arrives as `RCONPORT`.
 - Use `${VAR:-default}` for anything that may be unset.
+- Only use launch options the game's documentation lists, spelled as it spells them. Servers ignore options
+  they don't know, so an invented one boots fine and its setting does nothing.
 - Quote text settings where they're used: `-name "${SERVER_NAME}"`. `ARGS="-name ${SERVER_NAME}"; ./server $ARGS`
   splits "GBRHosting - My Server" into words; build optional arguments in a bash array instead
   (`args=(-name "$SERVER_NAME"); [ -n "$PASSWORD" ] && args+=(-password "$PASSWORD"); ./server "${args[@]}"`).
 - If the image installs the game itself on start, make sure a failed install is retried rather than
-  starting a server that isn't there (see ARK's template).
+  starting a server that isn't there: log in to SteamCMD once (`+login anonymous +quit`) before the
+  install, and retry the install a few times until the server's executable exists.
 
 ### Memory
 - `requiredMemoryMb` is the container's hard limit. A JVM or engine heap must stay about **1 GB below**
-  it: Minecraft's `MEMORY` is `3G` for `4096` MB. A heap equal to the limit is killed on start.
+  it: a `3G` heap for `4096` MB. A heap equal to the limit is killed on start.
 
 ### Settings (`defaultConfig` and `configSchema`)
 - Take keys and default values from what the server really writes: run
diff --git a/BUILDER.md b/BUILDER.md
index f53a866..357ea9f 100644
--- a/BUILDER.md
+++ b/BUILDER.md
@@ -25,12 +25,17 @@ progress / log / variants        ◄─post── build: first boot → draft 
    validates but never booted still gets a PR, titled `WIP:`, with what's left listed. Nothing reaches
    players until a person merges it and enables the game.
 
+The builder is **game-agnostic**: everything about a game comes from that game's research, first boot and
+boot tests. No game's name, id or code may appear in the builder's source, its rules for the model
+(`AUTHORING.md`), the schemas or this file, and the model is never shown another game's template (its format
+example is an invented server). `TestBuilderIsGameAgnostic` fails the build if one does.
+
 The worker only connects out (to the panel, Gitea, the model and the search services).
 
 ## Requirements
 
 A Docker host with the isolated `gbr-boottest` network (`RUNNER.md`, step 1), so servers booted by the
-builder can't reach private networks. Enough memory for the largest server it builds (~16 GB for ARK) and
+builder can't reach private networks. Enough memory for the largest server it builds (the biggest need ~16 GB) and
 disk for SteamCMD downloads. The image `gbr-builder:latest` is published by
 `.gitea/workflows/builder-image.yml` whenever `cmd/` changes on main.
 
@@ -54,9 +59,9 @@ On any machine with Docker and the `gbr-boottest` network, with `OLLAMA_URL`, `S
 `READER_URL` set:
 
 ```bash
-go run ./cmd/gbrgames research -name Valheim -out research.json
+go run ./cmd/gbrgames research -name "<game>" -out research.json
 # pick a variant from research.json into v.json, then:
-go run ./cmd/gbrgames build -name Valheim -variant @v.json -out build.json
+go run ./cmd/gbrgames build -name "<game>" -variant @v.json -out build.json
 ```
 
 The draft lands in `games/<id>/`, first-boot reports in `firstboot-out/`.
diff --git a/cmd/gbrgames/agnostic_test.go b/cmd/gbrgames/agnostic_test.go
new file mode 100644
index 0000000..d4db5bc
--- /dev/null
+++ b/cmd/gbrgames/agnostic_test.go
@@ -0,0 +1,51 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"testing"
+)
+
+// The builder must work the same for every game: no game's name, id or code in its source, its rules for
+// the model (AUTHORING.md), the schemas sent with every draft, or its docs. Games are read from games/,
+// so a newly merged template is covered as soon as it lands.
+func TestBuilderIsGameAgnostic(t *testing.T) {
+	root := filepath.Join("..", "..")
+	templates, _ := filepath.Glob(filepath.Join(root, "games", "*", "game.yaml"))
+	if len(templates) == 0 {
+		t.Fatal("no templates found to check against")
+	}
+	var names []string
+	for _, f := range templates {
+		g, err := loadMap(f)
+		if err != nil {
+			continue
+		}
+		for _, key := range []string{"id", "name"} {
+			if s, _ := g[key].(string); len(s) > 2 {
+				names = append(names, s)
+			}
+		}
+	}
+
+	files, _ := filepath.Glob("*.go")
+	files = append(files, filepath.Join(root, "AUTHORING.md"), filepath.Join(root, "BUILDER.md"))
+	schemas, _ := filepath.Glob(filepath.Join(root, "schema", "*.json"))
+	files = append(files, schemas...)
+	for _, f := range files {
+		raw, err := os.ReadFile(f)
+		if err != nil {
+			t.Fatal(err)
+		}
+		text := string(raw)
+		for _, n := range names {
+			re := regexp.MustCompile(`(?i)(^|[^A-Za-z0-9])` + regexp.QuoteMeta(n) + `($|[^A-Za-z0-9])`)
+			if loc := re.FindStringIndex(text); loc != nil {
+				line := strings.Count(text[:loc[0]], "\n") + 1
+				t.Errorf("%s:%d mentions %q: the builder must not name or copy any game", f, line, n)
+			}
+		}
+	}
+}
diff --git a/cmd/gbrgames/build.go b/cmd/gbrgames/build.go
index 2bfcf4e..1d4a96b 100644
--- a/cmd/gbrgames/build.go
+++ b/cmd/gbrgames/build.go
@@ -138,7 +138,8 @@ func build(o buildOptions) (*buildResult, error) {
 		steamApp = o.variant.SteamAppID
 	}
 	d, err := newDrafter(draftJob{GamesDir: o.gamesDir, SchemaDir: o.schemaDir, Name: o.name, ID: o.id, Image: res.Image,
-		SteamApp: steamApp, Notes: variantNotes(o.variant, o.notes), Report: report, Provider: o.provider, Model: o.model, NoPull: true})
+		SteamApp: steamApp, Notes: variantNotes(o.variant, o.notes), Report: report, Provider: o.provider, Model: o.model, NoPull: true,
+		Docs: sourceText(o.variant.Sources)})
 	if err != nil {
 		return nil, err
 	}
@@ -370,3 +371,27 @@ func buildSummary(o buildOptions, res *buildResult) string {
 	}
 	return b.String()
 }
+
+// sourceText reads the pages research based the variant on, in full, so the drafter can check that every
+// launch option the model uses is documented there. Empty (check skipped) without a reader.
+func sourceText(sources []string) string {
+	reader := os.Getenv("READER_URL")
+	if reader == "" || len(sources) == 0 {
+		fmt.Println("[build] no research sources to check launch options against (READER_URL or sources missing)")
+		return ""
+	}
+	var b strings.Builder
+	read := 0
+	for _, s := range sources {
+		text, err := readPageLimit(reader, s, 200_000)
+		if err != nil {
+			fmt.Printf("[build] could not read %s: %v\n", s, err)
+			continue
+		}
+		read++
+		b.WriteString(text)
+		b.WriteString("\n")
+	}
+	fmt.Printf("[build] read %d of %d research sources to check launch options against\n", read, len(sources))
+	return b.String()
+}
diff --git a/cmd/gbrgames/build_test.go b/cmd/gbrgames/build_test.go
index 75e9039..f31f6cb 100644
--- a/cmd/gbrgames/build_test.go
+++ b/cmd/gbrgames/build_test.go
@@ -6,12 +6,12 @@ import (
 )
 
 func TestBootFailureKeepsVerdictAndServerOutput(t *testing.T) {
-	out := "[boot-test] deploying boottest-valheim (cm2network/steamcmd)\n" +
-		"[boot-test] container started; waiting for ready pattern /Game server connected/\n" +
+	out := "[boot-test] deploying boottest-example (cm2network/steamcmd)\n" +
+		"[boot-test] container started; waiting for ready pattern /Server ready/\n" +
 		"[boot-test] FAILED: container exited before it was ready\n" +
 		"---- last 2 log lines ----\n" +
 		"Unknown argument --save-dir\n" +
-		"Usage: valheim_server.x86_64 ...\n"
+		"Usage: example_server ...\n"
 	got := bootFailure(out)
 	if !strings.Contains(got, "failed: FAILED: container exited before it was ready") {
 		t.Errorf("verdict missing: %s", got)
@@ -19,19 +19,19 @@ func TestBootFailureKeepsVerdictAndServerOutput(t *testing.T) {
 	if !strings.Contains(got, "Unknown argument --save-dir") || strings.Contains(got, "deploying boottest") {
 		t.Errorf("want only the server's last lines, got: %s", got)
 	}
-	if v := bootVerdict("[boot-test] PASSED: READY: Game server connected"); v != "PASSED: READY: Game server connected" {
+	if v := bootVerdict("[boot-test] PASSED: READY: Server ready"); v != "PASSED: READY: Server ready" {
 		t.Errorf("verdict = %q", v)
 	}
 }
 
 func TestOutsideDirsSkipsSteamNoise(t *testing.T) {
 	r := &bootReport{ContainerChanges: []string{
-		"A /home/steam/.config/unity3d/IronGate/Valheim/worlds_local/w.db",
+		"A /home/steam/.config/example-game/worlds/w.db",
 		"A /home/steam/Steam/logs/connection_log.txt",
 		"C /home/steam/.steam/registry.vdf",
 	}}
 	got := outsideDirs(r)
-	if len(got) != 1 || got[0] != "/home/steam/.config/unity3d/IronGate/Valheim/worlds_local" {
+	if len(got) != 1 || got[0] != "/home/steam/.config/example-game/worlds" {
 		t.Errorf("got %v", got)
 	}
 	if outsideDirs(nil) != nil {
@@ -40,9 +40,9 @@ func TestOutsideDirsSkipsSteamNoise(t *testing.T) {
 }
 
 func TestVariantNotes(t *testing.T) {
-	v := variant{Title: "Crossplay", Description: "PC + Xbox", StartupHint: "./valheim_server.x86_64 -crossplay", Ports: []string{"2456/udp"}}
+	v := variant{Title: "Crossplay", Description: "PC + Xbox", StartupHint: "./example_server -crossplay", Ports: []string{"30000/udp"}}
 	got := variantNotes(v, "needs Xbox")
-	for _, want := range []string{"variant: Crossplay (PC + Xbox)", "documented startup: ./valheim_server.x86_64 -crossplay", "2456/udp", "the admin asked for: needs Xbox"} {
+	for _, want := range []string{"variant: Crossplay (PC + Xbox)", "documented startup: ./example_server -crossplay", "30000/udp", "the admin asked for: needs Xbox"} {
 		if !strings.Contains(got, want) {
 			t.Errorf("missing %q in %q", want, got)
 		}
diff --git a/cmd/gbrgames/draft.go b/cmd/gbrgames/draft.go
index dc62d25..212956f 100644
--- a/cmd/gbrgames/draft.go
+++ b/cmd/gbrgames/draft.go
@@ -13,7 +13,6 @@ import (
 	"path"
 	"path/filepath"
 	"regexp"
-	"sort"
 	"strings"
 	"time"
 
@@ -39,7 +38,7 @@ func runDraft(args []string) error {
 	fs := flag.NewFlagSet("draft", flag.ExitOnError)
 	gamesDir := fs.String("games", "games", "directory holding one folder per game")
 	schemaDir := fs.String("schemas", "schema", "directory holding the JSON Schemas")
-	gameName := fs.String("name", "", "the game's name, e.g. \"Valheim\"")
+	gameName := fs.String("name", "", "the game's name, as players know it")
 	id := fs.String("id", "", "folder/id for the new game (default: from -name)")
 	image := fs.String("image", "", "Docker image the server runs in")
 	steamApp := fs.String("steam-app", "", "SteamCMD app id, if the server is installed with SteamCMD")
@@ -82,6 +81,9 @@ type draftJob struct {
 	Report              *bootReport
 	Provider, Model     string
 	NoPull              bool
+	// Text of the pages research based the variant on; when set, every launch option in the startup
+	// command must appear in it (or in the image's scripts)
+	Docs string
 }
 
 // drafter holds one conversation with the model about one game, so later problems (a failed boot) can
@@ -137,7 +139,7 @@ func newDrafter(j draftJob) (*drafter, error) {
 	}
 	d.messages = []chatMessage{
 		{Role: "system", Content: draftSystemPrompt(string(rules))},
-		{Role: "user", Content: draftRequest(j.Name, id, j.Image, j.SteamApp, j.Notes, d.facts, j.Report, exampleTemplates(j.GamesDir, 2))},
+		{Role: "user", Content: draftRequest(j.Name, id, j.Image, j.SteamApp, j.Notes, d.facts, j.Report)},
 	}
 	return d, nil
 }
@@ -200,6 +202,7 @@ func (d *drafter) check(answer string) []string {
 			problems = append(problems, savesOutsideVolumes(g, d.job.Report)...)
 			problems = append(problems, splitSettings(g)...)
 			problems = append(problems, portSettings(g)...)
+			problems = append(problems, undocumentedOptions(g, d.job.Docs, d.facts)...)
 		}
 	}
 	return problems
@@ -337,7 +340,7 @@ func closestVar(name string, vars []string) string {
 var outsideNoise = []string{"/Steam/logs/", "/.steam/", "/steamcmd/", "/.cache/", "/tmp/", "/.local/share/umu"}
 
 // savesOutsideVolumes turns first boot's "written outside the volumes" into a hard check: anything the
-// game itself wrote there (Valheim's worlds and admin lists in ~/.config/unity3d/...) is lost every time the
+// game itself wrote there (worlds or player lists under the user's home folder) is lost every time the
 // node recreates the container. A template passes once its startup command or settings point the game at
 // /server or /data; a boot test then shows whether that really worked.
 func savesOutsideVolumes(game map[string]any, report *bootReport) []string {
@@ -403,7 +406,7 @@ func imageUnusable(r *bootReport) string {
 		*r.ExitCode, r.RanSeconds, r.User, denied[0])
 }
 
-func draftRequest(gameName, id, image, steamApp, notes string, facts *imageFacts, report *bootReport, examples string) string {
+func draftRequest(gameName, id, image, steamApp, notes string, facts *imageFacts, report *bootReport) string {
 	var b strings.Builder
 	fmt.Fprintf(&b, "Write the template for **%s**.\n- id: %s\n- defaultDockerImage: %s\n", gameName, id, image)
 	if steamApp != "" {
@@ -447,33 +450,62 @@ func draftRequest(gameName, id, image, steamApp, notes string, facts *imageFacts
 	} else {
 		b.WriteString("\n(No first-boot report: keep readyPattern out unless the facts show the ready line.)\n")
 	}
-	b.WriteString("\n## Working templates from this repo, for format and style (not content)\n")
-	b.WriteString(examples)
+	b.WriteString("\n## Format example\nAn invented server, to show the format and house style only. Its command, options, " +
+		"ports and app id belong to no real game: never copy them; take every value from the facts above.\n```yaml\n")
+	b.WriteString(exampleTemplate)
+	b.WriteString("```\n")
 	return b.String()
 }
 
-// exampleTemplates picks the shortest templates in the repo as examples: real, validated, and small
-// enough to leave the model room for the facts.
-func exampleTemplates(gamesDir string, n int) string {
-	entries, _ := os.ReadDir(gamesDir)
-	type ex struct {
-		id   string
-		body string
-	}
-	var all []ex
-	for _, e := range entries {
-		raw, err := os.ReadFile(filepath.Join(gamesDir, e.Name(), "game.yaml"))
-		if err == nil {
-			all = append(all, ex{e.Name(), string(raw)})
-		}
-	}
-	sort.Slice(all, func(i, j int) bool { return len(all[i].body) < len(all[j].body) })
-	var b strings.Builder
-	for i := 0; i < n && i < len(all); i++ {
-		fmt.Fprintf(&b, "\n### games/%s/game.yaml\n```yaml\n%s```\n", all[i].id, all[i].body)
-	}
-	return b.String()
-}
+// exampleTemplate shows the model the format only. It's invented on purpose: the builder must stay
+// game-agnostic, so the model never sees another game's template (whose options it would copy). Its
+// command, options, port and app id belong to no real server; validated in draft_test.go.
+const exampleTemplate = `id: example-server
+name: Example Server
+defaultDockerImage: cm2network/steamcmd
+defaultStartupCommand: args=(-name "${SERVER_NAME}" -world "${WORLD_NAME:-world}" -port 30000 -datadir /server/saves); [ -n "${JOIN_PASSWORD}" ] && args+=(-password "${JOIN_PASSWORD}"); ./example_server "${args[@]}"
+requiredMemoryMb: 4096
+requiredDiskMb: 8192
+defaultPorts:
+  - 30000/udp
+  - 30001/udp
+installMethod: STEAMCMD
+installConfig:
+  appId: "1000000"
+defaultConfig:
+  JoinPassword: ""
+  ServerName: GBRHosting - {SERVER_NAME}
+  WorldName: world
+configSchema:
+  type: object
+  properties:
+    JoinPassword:
+      title: Join Password
+      description: Password players enter to join. Leave empty for a public server.
+      type: string
+      default: ""
+      category: Security & Access
+      x-savedValue:
+        key: GAME_JOIN_PASSWORD
+        label: Game join password
+        secret: true
+    ServerName:
+      title: Server Name
+      description: The name shown in the server browser.
+      type: string
+      default: GBRHosting - {SERVER_NAME}
+      category: System & General
+      showOnDeploy: true
+    WorldName:
+      title: World Name
+      description: The world to load. A new name starts a new world.
+      type: string
+      default: world
+      category: World & Environment
+backupPaths:
+  - saves
+readyPattern: 'Server is ready for connections'
+`
 
 // writeDraft turns the model's JSON answer into games/<id>/game.yaml and test.yaml, using the importer's
 // writer so drafts look like every other template.
diff --git a/cmd/gbrgames/draft_test.go b/cmd/gbrgames/draft_test.go
index 062fa7c..09ac806 100644
--- a/cmd/gbrgames/draft_test.go
+++ b/cmd/gbrgames/draft_test.go
@@ -2,14 +2,16 @@ package main
 
 import (
 	"encoding/json"
+	"os"
+	"path/filepath"
 	"strings"
 	"testing"
 )
 
 func TestDraftCompletenessNamesMissingSchemaEntries(t *testing.T) {
-	// The Valheim draft that went round in circles: settings in defaultConfig, no configSchema
+	// A draft that went round in circles: settings in defaultConfig, no configSchema
 	game := map[string]any{
-		"defaultPorts":     []any{"2456/udp"},
+		"defaultPorts":     []any{"30000/udp"},
 		"requiredMemoryMb": json.Number("4096"),
 		"defaultConfig":    map[string]any{"ServerName": "x", "ServerPassword": "", "MaxPlayers": json.Number("8")},
 	}
@@ -44,28 +46,28 @@ func TestUnreadSettings(t *testing.T) {
 }
 
 func TestSavesOutsideVolumes(t *testing.T) {
-	// Valheim's real first boot: its own files in ~/.config, plus Steam client logs (noise)
-	valheim := &bootReport{ContainerChanges: []string{
-		"A /home/steam/.config/unity3d/IronGate/Valheim/adminlist.txt",
-		"A /home/steam/.config/unity3d/IronGate/Valheim/bannedlist.txt",
-		"A /home/steam/Steam/logs/connection_log_2456.txt",
+	// A real first boot: the game's own files in ~/.config, plus Steam client logs (noise)
+	home := &bootReport{ContainerChanges: []string{
+		"A /home/steam/.config/example-game/adminlist.txt",
+		"A /home/steam/.config/example-game/bannedlist.txt",
+		"A /home/steam/Steam/logs/connection_log_30000.txt",
 	}}
-	game := map[string]any{"defaultStartupCommand": "./valheim_server.x86_64 -nographics -batchmode -world X"}
-	problems := savesOutsideVolumes(game, valheim)
-	if len(problems) != 1 || !strings.Contains(problems[0], "/home/steam/.config/unity3d/IronGate/Valheim") || strings.Contains(problems[0], "Steam/logs") {
+	game := map[string]any{"defaultStartupCommand": "./example_server -nographics -batchmode -world X"}
+	problems := savesOutsideVolumes(game, home)
+	if len(problems) != 1 || !strings.Contains(problems[0], "/home/steam/.config/example-game") || strings.Contains(problems[0], "Steam/logs") {
 		t.Fatalf("got %v", problems)
 	}
 
 	// Fixed with a save-directory option under /server
-	game["defaultStartupCommand"] = "./valheim_server.x86_64 -nographics -batchmode -world X -savedir /server/saves"
-	if p := savesOutsideVolumes(game, valheim); p != nil {
+	game["defaultStartupCommand"] = "./example_server -nographics -batchmode -world X -datadir /server/saves"
+	if p := savesOutsideVolumes(game, home); p != nil {
 		t.Errorf("redirected template still flagged: %v", p)
 	}
 
-	// ARK's real first boot: only Proton's cache, which is not game data
-	ark := &bootReport{ContainerChanges: []string{"A /home/gameserver/.cache/umu-protonfixes/protonfixes_test.log"}}
-	if p := savesOutsideVolumes(map[string]any{}, ark); p != nil {
-		t.Errorf("ARK proton cache flagged: %v", p)
+	// A Proton server's first boot: only Proton's cache, which is not game data
+	proton := &bootReport{ContainerChanges: []string{"A /home/gameserver/.cache/umu-protonfixes/protonfixes_test.log"}}
+	if p := savesOutsideVolumes(map[string]any{}, proton); p != nil {
+		t.Errorf("proton cache flagged: %v", p)
 	}
 }
 
@@ -86,10 +88,43 @@ func TestImageUnusable(t *testing.T) {
 }
 
 func TestDraftCompletenessRejectsSecrets(t *testing.T) {
-	// The Valheim draft that couldn't be boot-tested: the password mapped to a CI secret nobody created
-	test := map[string]any{"settleSec": json.Number("120"), "secrets": map[string]any{"Password": "VALHEIM_TEST_PASSWORD"}}
+	// A draft that couldn't be boot-tested: the password mapped to a CI secret nobody created
+	test := map[string]any{"settleSec": json.Number("120"), "secrets": map[string]any{"Password": "EXAMPLE_TEST_PASSWORD"}}
 	problems := strings.Join(draftCompleteness(map[string]any{}, test), "\n")
 	if !strings.Contains(problems, "test.yaml has 'secrets' (Password)") {
 		t.Errorf("got:\n%s", problems)
 	}
 }
+
+// The model copies the example's format, so it must pass everything a draft has to pass
+func TestExampleTemplateFollowsTheRules(t *testing.T) {
+	dir := filepath.Join(t.TempDir(), "example-server")
+	if err := os.MkdirAll(dir, 0o755); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(filepath.Join(dir, "game.yaml"), []byte(exampleTemplate), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(filepath.Join(dir, "test.yaml"), []byte("timeoutSec: 2400\n"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	gs, err := compileSchema(filepath.Join("..", "..", "schema", "game.schema.json"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	ts, err := compileSchema(filepath.Join("..", "..", "schema", "test.schema.json"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	problems := validateGame(dir, "example-server", gs, ts)
+	g, err := loadMap(filepath.Join(dir, "game.yaml"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	problems = append(problems, draftCompleteness(g, map[string]any{})...)
+	problems = append(problems, splitSettings(g)...)
+	problems = append(problems, portSettings(g)...)
+	for _, p := range problems {
+		t.Error(p)
+	}
+}
diff --git a/cmd/gbrgames/draftchecks.go b/cmd/gbrgames/draftchecks.go
index 5db39a0..097341c 100644
--- a/cmd/gbrgames/draftchecks.go
+++ b/cmd/gbrgames/draftchecks.go
@@ -3,6 +3,7 @@ package main
 import (
 	"encoding/json"
 	"fmt"
+	"path"
 	"regexp"
 	"sort"
 	"strconv"
@@ -75,7 +76,7 @@ func splitSettings(game map[string]any) []string {
 
 var shellWrap = regexp.MustCompile(`^\s*(?:ba)?sh\s+-c\s+'(.*)'\s*$`)
 
-// unwrapShell looks inside a startup command that is one bash -c '...' (ARK's), which would otherwise be
+// unwrapShell looks inside a startup command that is one bash -c '...', which would otherwise be
 // all single-quoted text.
 func unwrapShell(cmd string) string {
 	if m := shellWrap.FindStringSubmatch(cmd); m != nil && !strings.Contains(m[1], "'") {
@@ -248,3 +249,77 @@ func portNumber(v any) (int, bool) {
 	p, err := strconv.Atoi(strings.TrimSpace(s))
 	return p, err == nil && p > 0 && p < 65536
 }
+
+var (
+	optionToken = regexp.MustCompile(`(?:^|[\s("'])(-{1,2}[A-Za-z][A-Za-z0-9_.]*(?:-[A-Za-z0-9_.]+)*)`)
+	segmentSep  = regexp.MustCompile(`;|&&|\|\||\||\n`)
+	testOps     = map[string]bool{"eq": true, "ne": true, "lt": true, "gt": true, "le": true, "ge": true, "nt": true, "ot": true, "ef": true}
+	// Options of these are the shell's and its tools', not the game's
+	shellTools = map[string]bool{"mkdir": true, "cp": true, "mv": true, "ln": true, "rm": true, "chmod": true, "chown": true,
+		"wget": true, "curl": true, "tar": true, "unzip": true, "test": true, "[": true, "[[": true, "echo": true, "printf": true,
+		"sleep": true, "find": true, "sed": true, "grep": true, "cd": true, "export": true, "touch": true, "bash": true, "sh": true,
+		"cat": true, "head": true, "tail": true, "ls": true, "set": true, "ulimit": true, "env": true, "id": true}
+)
+
+// undocumentedOptions finds launch options in the startup command that none of the researched pages (nor
+// the image's own scripts) mention. Servers silently ignore options they don't know, so a made-up one
+// boots fine and passes every boot test while its setting does nothing.
+func undocumentedOptions(game map[string]any, docs string, facts *imageFacts) []string {
+	if strings.TrimSpace(docs) == "" {
+		return nil
+	}
+	startup, _ := game["defaultStartupCommand"].(string)
+	corpus := docs
+	if facts != nil {
+		for _, s := range facts.Scripts {
+			corpus += "\n" + s
+		}
+	}
+	seen := map[string]bool{}
+	var missing []string
+	for _, opt := range launchOptions(unwrapShell(startup)) {
+		name := strings.TrimLeft(opt, "-")
+		key := strings.ToLower(name)
+		if seen[key] {
+			continue
+		}
+		seen[key] = true
+		documented := regexp.MustCompile(`(?i)(^|[^A-Za-z0-9_])-{1,2}` + regexp.QuoteMeta(name) + `($|[^A-Za-z0-9_])`)
+		if !documented.MatchString(corpus) {
+			missing = append(missing, opt)
+		}
+	}
+	if len(missing) == 0 {
+		return nil
+	}
+	return []string{fmt.Sprintf("the startup command passes %s, which none of the pages researched for this game mention. "+
+		"Servers silently ignore options they don't know, so it boots fine but does nothing: remove it (and any setting that "+
+		"only feeds it), or spell it exactly as the documentation does", strings.Join(missing, ", "))}
+}
+
+// launchOptions lists the -options passed to the game, skipping the shell's own (mkdir -p, [ -n ... ]).
+func launchOptions(cmd string) []string {
+	var out []string
+	for _, seg := range segmentSep.Split(cmd, -1) {
+		fields := strings.Fields(strings.TrimLeft(strings.TrimSpace(seg), "({"))
+		i := 0
+		for i < len(fields) && (fields[i] == "exec" || fields[i] == "then" || fields[i] == "do" || fields[i] == "else" ||
+			(assignWord.MatchString(fields[i]) && !strings.Contains(fields[i], "=("))) {
+			i++
+		}
+		if i == len(fields) {
+			continue
+		}
+		if word := path.Base(fields[i]); shellTools[word] {
+			continue
+		}
+		for _, m := range optionToken.FindAllStringSubmatch(strings.Join(fields[i:], " "), -1) {
+			name := strings.TrimLeft(m[1], "-")
+			if len(name) < 2 || testOps[name] {
+				continue
+			}
+			out = append(out, m[1])
+		}
+	}
+	return out
+}
diff --git a/cmd/gbrgames/draftchecks_test.go b/cmd/gbrgames/draftchecks_test.go
index 148ea9f..0a04473 100644
--- a/cmd/gbrgames/draftchecks_test.go
+++ b/cmd/gbrgames/draftchecks_test.go
@@ -14,12 +14,12 @@ func textSettings(keys ...string) map[string]any {
 	return map[string]any{"properties": props}
 }
 
-func TestSplitSettingsCatchesTheValheimDraft(t *testing.T) {
-	// What the builder drafted for Valheim: quoted in the assignment, split by the unquoted $ARGS
+func TestSplitSettingsCatchesAnArgsString(t *testing.T) {
+	// A real draft: quoted in the assignment, split by the unquoted $ARGS
 	game := map[string]any{
-		"defaultStartupCommand": `ARGS="-name ${SERVER_NAME:-Valheim Server} -port 2456 -world ${WORLD_NAME:-Dedicated}"; ` +
+		"defaultStartupCommand": `ARGS="-name ${SERVER_NAME:-Example Server} -port 30000 -world ${WORLD_NAME:-Dedicated}"; ` +
 			`[ -n "$PASSWORD" ] && ARGS="$ARGS -password $PASSWORD"; [ "$CROSSPLAY" = "true" ] && ARGS="$ARGS -crossplay"; ` +
-			`HOME=/server ./valheim_server.x86_64 $ARGS`,
+			`HOME=/server ./example_server $ARGS`,
 		"configSchema": textSettings("ServerName", "WorldName", "Password"),
 	}
 	problems := splitSettings(game)
@@ -36,8 +36,8 @@ func TestSplitSettingsCatchesTheValheimDraft(t *testing.T) {
 
 func TestSplitSettingsAcceptsQuotedAndArrays(t *testing.T) {
 	for _, startup := range []string{
-		`./valheim_server.x86_64 -name "${SERVER_NAME}" -world "$WORLD_NAME" -port 2456`,
-		`args=(-name "$SERVER_NAME" -world "${WORLD_NAME:-Dedicated}"); [ -n "$PASSWORD" ] && args+=(-password "$PASSWORD"); ./valheim_server.x86_64 "${args[@]}"`,
+		`./example_server -name "${SERVER_NAME}" -world "$WORLD_NAME" -port 30000`,
+		`args=(-name "$SERVER_NAME" -world "${WORLD_NAME:-Dedicated}"); [ -n "$PASSWORD" ] && args+=(-password "$PASSWORD"); ./example_server "${args[@]}"`,
 		`bash -c 'exec ./server -name "$SERVER_NAME"'`,
 	} {
 		game := map[string]any{"defaultStartupCommand": startup, "configSchema": textSettings("ServerName", "WorldName", "Password")}
@@ -72,12 +72,12 @@ func TestSplitSettingsDirectAndArrayMisuse(t *testing.T) {
 
 func TestPortSettings(t *testing.T) {
 	game := map[string]any{
-		"defaultPorts": []any{"2456/udp", "2457/udp"},
+		"defaultPorts": []any{"30000/udp", "30001/udp"},
 		"defaultConfig": map[string]any{
-			"GamePort":   json.Number("2456"),
+			"GamePort":   json.Number("30000"),
 			"QueryPort":  json.Number("27015"),
 			"RCONPort":   json.Number("25575"),
-			"PublicPort": "{PUBLIC_PORT_2456}",
+			"PublicPort": "{PUBLIC_PORT_30000}",
 			"Transport":  "udp",
 			"Export":     json.Number("9"),
 		},
@@ -86,7 +86,7 @@ func TestPortSettings(t *testing.T) {
 		}},
 	}
 	got := strings.Join(portSettings(game), "\n")
-	if !strings.Contains(got, "setting GamePort lets owners change the port") || !strings.Contains(got, "write 2456 directly") {
+	if !strings.Contains(got, "setting GamePort lets owners change the port") || !strings.Contains(got, "write 30000 directly") {
 		t.Errorf("editable published port not caught:\n%s", got)
 	}
 	if !strings.Contains(got, "setting QueryPort defaults to port 27015, which defaultPorts does not publish") {
@@ -105,3 +105,47 @@ func TestPortSettings(t *testing.T) {
 		t.Errorf("got %v", p)
 	}
 }
+
+func TestUndocumentedOptionsCatchesMaxPlayers(t *testing.T) {
+	// A real draft's startup: every option is documented except -maxplayers
+	game := map[string]any{"defaultStartupCommand": `args=(-name "${SERVER_NAME:-GBRHosting - Example}" -port 30000 -world "${WORLD_NAME:-Dedicated}" -datadir /server); ` +
+		`[ -n "${SERVER_PASSWORD}" ] && args+=(-password "${SERVER_PASSWORD}"); [ "${CROSSPLAY}" = "true" ] && args+=(-crossplay); ` +
+		`[ -n "${MAX_PLAYERS}" ] && args+=(-maxplayers "${MAX_PLAYERS}"); ./example_server "${args[@]}"`}
+	docs := "Launch with `-name`, `-port`, `-world`, `-password`, `-datadir <path>` and `-crossplay` to allow consoles."
+	got := undocumentedOptions(game, docs, nil)
+	if len(got) != 1 || !strings.Contains(got[0], "passes -maxplayers,") {
+		t.Fatalf("want only -maxplayers flagged, got %v", got)
+	}
+	// Once removed, nothing is left to flag
+	game["defaultStartupCommand"] = strings.Replace(game["defaultStartupCommand"].(string), `[ -n "${MAX_PLAYERS}" ] && args+=(-maxplayers "${MAX_PLAYERS}"); `, "", 1)
+	if got := undocumentedOptions(game, docs, nil); len(got) != 0 {
+		t.Errorf("got %v", got)
+	}
+}
+
+func TestUndocumentedOptionsIgnoresShellAndUsesImageScripts(t *testing.T) {
+	game := map[string]any{"defaultStartupCommand": `mkdir -p /server/.config; cp -f /a /b; [ -n "$X" ] && [ "$Y" -eq 1 ] && ` +
+		`exec ./server --listen-port=7777 -ServerPlatform=ALL -logs`}
+	facts := &imageFacts{Scripts: map[string]string{"/start.sh": `exec "$@" -logs`}}
+	got := strings.Join(undocumentedOptions(game, "Use --listen-port and -ServerPlatform=ALL for crossplay.", facts), "\n")
+	if got != "" {
+		t.Errorf("shell options, documented ones and ones the image's script uses must pass, got %q", got)
+	}
+	// Without sources the check is off (draft run by hand, or no reader configured)
+	game["defaultStartupCommand"] = "./server -madeup"
+	if p := undocumentedOptions(game, "", nil); p != nil {
+		t.Errorf("got %v", p)
+	}
+	if p := undocumentedOptions(game, "unrelated page", nil); len(p) != 1 {
+		t.Errorf("want -madeup flagged, got %v", p)
+	}
+}
+
+func TestUndocumentedOptionsWholeWords(t *testing.T) {
+	// "-port" in the docs doesn't document "-portal", and "-port" isn't documented by "-portal"
+	game := map[string]any{"defaultStartupCommand": "./server -port 1 -portal x"}
+	got := strings.Join(undocumentedOptions(game, "options: -port", nil), "")
+	if !strings.Contains(got, "passes -portal,") || strings.Contains(got, "-port,") {
+		t.Errorf("got %q", got)
+	}
+}
diff --git a/cmd/gbrgames/firstboot.go b/cmd/gbrgames/firstboot.go
index 2724716..fd37229 100644
--- a/cmd/gbrgames/firstboot.go
+++ b/cmd/gbrgames/firstboot.go
@@ -466,8 +466,8 @@ func (b *booter) copyOut(vol, mount string, files []string, report *bootReport)
 	return cmd.Wait()
 }
 
-// fileLines reads the copied log files, so ready and error lines that never reach the console (ARK
-// writes to ShooterGame.log) are found too.
+// fileLines reads the copied log files, so ready and error lines that never reach the console (servers
+// that only log to a file) are found too.
 func (b *booter) fileLines(report *bootReport) []logLine {
 	var out []logLine
 	for _, f := range report.FilesCreated {
diff --git a/cmd/gbrgames/firstboot_test.go b/cmd/gbrgames/firstboot_test.go
index e318eb2..17c58a1 100644
--- a/cmd/gbrgames/firstboot_test.go
+++ b/cmd/gbrgames/firstboot_test.go
@@ -6,21 +6,21 @@ import (
 )
 
 func TestParseConfigFormats(t *testing.T) {
-	// Palworld's Unreal-style list
-	pal := parseConfig("/server/Pal/Saved/Config/LinuxServer/PalWorldSettings.ini", "[/Script/Pal.PalGameWorldSettings]\n"+
-		`OptionSettings=(Difficulty=None,ExpRate=1.000000,ServerName="Default Palworld Server",CrossplayPlatforms=(Steam,Xbox,PS5,Mac))`)
-	want := map[string]string{"Difficulty": "None", "ExpRate": "1.000000", "ServerName": "Default Palworld Server", "CrossplayPlatforms": "(Steam,Xbox,PS5,Mac)"}
-	if len(pal) != len(want) {
-		t.Fatalf("palworld: got %d settings: %+v", len(pal), pal)
+	// An Unreal-style option list
+	list := parseConfig("/server/Game/Saved/Config/LinuxServer/GameSettings.ini", "[/Script/Game.WorldSettings]\n"+
+		`OptionSettings=(Difficulty=None,ExpRate=1.000000,ServerName="Default Server",CrossplayPlatforms=(Steam,Xbox,PS5,Mac))`)
+	want := map[string]string{"Difficulty": "None", "ExpRate": "1.000000", "ServerName": "Default Server", "CrossplayPlatforms": "(Steam,Xbox,PS5,Mac)"}
+	if len(list) != len(want) {
+		t.Fatalf("option list: got %d settings: %+v", len(list), list)
 	}
-	for _, s := range pal {
+	for _, s := range list {
 		if s.Section != "OptionSettings" || want[s.Key] != s.Value {
-			t.Errorf("palworld setting %+v", s)
+			t.Errorf("option list setting %+v", s)
 		}
 	}
 
-	// Minecraft's server.properties
-	mc := parseConfig("/data/server.properties", "#Minecraft server properties\nmax-players=20\nmotd=A Minecraft Server\nlevel-seed=\n")
+	// A server.properties file
+	mc := parseConfig("/data/server.properties", "#Server properties\nmax-players=20\nmotd=A Server\nlevel-seed=\n")
 	if len(mc) != 3 || mc[0].Key != "max-players" || mc[0].Value != "20" || mc[2].Value != "" {
 		t.Errorf("properties: %+v", mc)
 	}
@@ -66,7 +66,7 @@ func TestAnalyzeLines(t *testing.T) {
 		{At: 2, Source: "console", Text: "Failed to load optional module"},
 		{At: 9, Source: "console", Text: "[09:00:01 INFO]: Done (8.1s)! For help, type \"help\""},
 		{At: 9, Source: "console", Text: "[09:00:01 INFO]: Thread RCON Listener started"},
-		// After the stop at 200s: the shutdown, as Minecraft's runner prints it
+		// After the stop at 200s: the shutdown, as a wrapper script prints it
 		{At: 201, Source: "console", Text: "[06:01:39] [RCON Listener #1/INFO]: Thread RCON Client /0:0:0:0:0:0:0:1 started"},
 		{At: 202, Source: "console", Text: "2026-10-25T06:01:39.976Z\tINFO\tmc-server-runner\tDone"},
 	}, []logLine{{At: -1, Source: "/server/x.log", Text: "Listening on 0.0.0.0:7777"}}, 200)
@@ -90,13 +90,13 @@ func TestAnalyzeLines(t *testing.T) {
 
 func TestConfigCandidates(t *testing.T) {
 	for rel, want := range map[string]bool{
-		"server.properties":                      true,
-		"Pal/Saved/Config/LinuxServer/x.ini":     true,
-		"ShooterGame/Saved/Logs/ShooterGame.log": true,
-		"steamapps/appmanifest_123.acf":          false,
-		"Engine/Config/BaseEngine.ini":           false,
-		"plugins/Geyser/config.yml":              false,
-		"world/level.dat":                        false,
+		"server.properties":                   true,
+		"Game/Saved/Config/LinuxServer/x.ini": true,
+		"Game/Saved/Logs/Server.log":          true,
+		"steamapps/appmanifest_123.acf":       false,
+		"Engine/Config/BaseEngine.ini":        false,
+		"plugins/SomePlugin/config.yml":       false,
+		"world/level.dat":                     false,
 	} {
 		if got := isConfigCandidate(rel, 1000); got != want {
 			t.Errorf("isConfigCandidate(%q) = %v, want %v", rel, got, want)
diff --git a/cmd/gbrgames/inspect.go b/cmd/gbrgames/inspect.go
index ee7b2f6..8d30bdd 100644
--- a/cmd/gbrgames/inspect.go
+++ b/cmd/gbrgames/inspect.go
@@ -278,8 +278,8 @@ func parseProbe(f *imageFacts, out string) {
 }
 
 // suggestContainerUser works out whether the image only works as a specific user. Images either declare
-// it (USER) or are built around an account whose home folder nobody else may enter (ARK's gameserver,
-// uid 25000, with /home/gameserver at 700).
+// it (USER) or are built around an account whose home folder nobody else may enter (e.g. a home folder
+// at mode 700 owned by a uid other than 1000).
 func suggestContainerUser(f *imageFacts) {
 	if u := strings.TrimSpace(f.User); u != "" && u != "root" && u != "0" {
 		resolved := resolveUser(f, u)
@@ -364,7 +364,7 @@ func checkTemplate(game map[string]any, f *imageFacts) (problems, notes []string
 	}
 	if cmd, _ := game["defaultStartupCommand"].(string); cmd != "" {
 		for _, m := range assignedVars.FindAllStringSubmatch(cmd, -1) {
-			provided[m[1]] = true // set by the command itself, e.g. export ASA_START_PARAMS=...
+			provided[m[1]] = true // set by the command itself, e.g. export START_PARAMS=...
 		}
 		withDefault := map[string]bool{}
 		for _, m := range defaultedRef.FindAllStringSubmatch(cmd, -1) {
@@ -410,7 +410,7 @@ func containerPort(p string) string {
 	return p
 }
 
-// startupScriptPaths picks absolute paths out of a template's startup command (e.g. ARK's
+// startupScriptPaths picks absolute paths out of a template's startup command (e.g. an image's
 // /usr/bin/start_server) so the probe reads those scripts too.
 func startupScriptPaths(game map[string]any) []string {
 	cmd, _ := game["defaultStartupCommand"].(string)
diff --git a/cmd/gbrgames/inspect_test.go b/cmd/gbrgames/inspect_test.go
index 8b80946..ebfb33d 100644
--- a/cmd/gbrgames/inspect_test.go
+++ b/cmd/gbrgames/inspect_test.go
@@ -21,7 +21,7 @@ func TestEnvNameMatchesNodeAgent(t *testing.T) {
 	}
 }
 
-// Probe output as ARK's image produces it (trimmed)
+// Probe output of an image built around its own user (trimmed)
 const arkProbe = probeMarker + ` passwd
 root:x:0:0:root:/root:/bin/bash
 gameserver:x:25000:25000::/home/gameserver:/bin/bash
@@ -34,7 +34,7 @@ bash|/usr/bin/bash
 ` + probeMarker + ` script /usr/bin/start_server
 #!/bin/bash
 cd /home/gameserver/steamcmd
-echo "$ASA_START_PARAMS ${ENABLE_DEBUG} $HOME"
+echo "$START_PARAMS ${ENABLE_DEBUG} $HOME"
 `
 
 func arkFacts() *imageFacts {
@@ -55,7 +55,7 @@ func TestProbeParsing(t *testing.T) {
 	if !strings.Contains(f.Scripts["/usr/bin/start_server"], "steamcmd") {
 		t.Fatalf("script not captured: %q", f.Scripts)
 	}
-	if want := []string{"ASA_START_PARAMS", "ENABLE_DEBUG"}; !reflect.DeepEqual(f.EnvRead, want) {
+	if want := []string{"ENABLE_DEBUG", "START_PARAMS"}; !reflect.DeepEqual(f.EnvRead, want) {
 		t.Errorf("envRead = %v, want %v (HOME is common and left out)", f.EnvRead, want)
 	}
 }
@@ -63,7 +63,7 @@ func TestProbeParsing(t *testing.T) {
 func TestSuggestContainerUser(t *testing.T) {
 	// Locked home owned by another uid: use that account, with its own group
 	if f := arkFacts(); f.SuggestedContainerUser != "25000:25000" {
-		t.Errorf("ARK: suggested %q, want 25000:25000", f.SuggestedContainerUser)
+		t.Errorf("suggested %q, want 25000:25000", f.SuggestedContainerUser)
 	}
 
 	// uid 1000 images need nothing
@@ -92,9 +92,9 @@ func TestCheckTemplate(t *testing.T) {
 	f := arkFacts()
 	game := map[string]any{
 		"defaultConfig": map[string]any{"RCONPort": 27020, "MaxPlayers": 70},
-		// Mirrors ARK's old command: ASA_START_PARAMS is assigned, SERVER_MAP has a default, RCON_PORT is the
+		// A command where START_PARAMS is assigned, SERVER_MAP has a default, RCON_PORT is the
 		// misnamed one, MAX_PLAYERS is set by a setting, MISSING has no default at all
-		"defaultStartupCommand": `export ASA_START_PARAMS="${ASA_START_PARAMS:-${SERVER_MAP:-TheIsland}?RCONPort=${RCON_PORT:-27020} -Max=${MAX_PLAYERS:-70} ${MISSING}}"`,
+		"defaultStartupCommand": `export START_PARAMS="${START_PARAMS:-${SERVER_MAP:-DefaultMap}?RCONPort=${RCON_PORT:-27020} -Max=${MAX_PLAYERS:-70} ${MISSING}}"`,
 	}
 	problems, _ := checkTemplate(game, f)
 	joined := strings.Join(problems, "\n")
@@ -103,7 +103,7 @@ func TestCheckTemplate(t *testing.T) {
 			t.Errorf("missing problem %q in:\n%s", want, joined)
 		}
 	}
-	for _, unwanted := range []string{"ASA_START_PARAMS", "SERVER_MAP", "MAX_PLAYERS}"} {
+	for _, unwanted := range []string{"START_PARAMS", "SERVER_MAP", "MAX_PLAYERS}"} {
 		if strings.Contains(joined, unwanted) {
 			t.Errorf("false problem about %s in:\n%s", unwanted, joined)
 		}
@@ -114,7 +114,7 @@ func TestCheckTemplate(t *testing.T) {
 
 	// With the fixes, only the deliberately missing variable is left; 25000:1000 counts (same uid)
 	game["containerUser"] = "25000:1000"
-	game["defaultStartupCommand"] = `export ASA_START_PARAMS="${ASA_START_PARAMS:-x}?RCONPort=${RCONPORT:-27020}"`
+	game["defaultStartupCommand"] = `export START_PARAMS="${START_PARAMS:-x}?RCONPort=${RCONPORT:-27020}"`
 	if problems, _ := checkTemplate(game, f); len(problems) != 0 {
 		t.Errorf("fixed template still has problems: %v", problems)
 	}
diff --git a/cmd/gbrgames/research.go b/cmd/gbrgames/research.go
index 167fa7a..deae108 100644
--- a/cmd/gbrgames/research.go
+++ b/cmd/gbrgames/research.go
@@ -76,7 +76,7 @@ var researchSchema = map[string]any{
 
 func runResearch(args []string) error {
 	fs := flag.NewFlagSet("research", flag.ExitOnError)
-	gameName := fs.String("name", "", "the game's name, e.g. \"Valheim\"")
+	gameName := fs.String("name", "", "the game's name, as players know it")
 	notes := fs.String("notes", "", "what the admin asked for (crossplay, a modded edition...)")
 	provider := fs.String("provider", "ollama", "ollama or gemini")
 	modelName := fs.String("model", "", "model name (default as for draft)")
@@ -171,8 +171,8 @@ func research(m model, gameName, notes string, pages int) (*researchResult, erro
 
 const researchPrompt = "You research how to host a game's dedicated server for GBR Hosting, a game server host. Servers run " +
 	"in Docker on Linux, as a non-root user, with a volume at /server. From the search results and pages given, list " +
-	"the ways this game's dedicated server can be run (variants): different editions (e.g. Java vs Bedrock, Evolved vs " +
-	"Ascended), crossplay builds, or notably different server images. For each variant give:\n" +
+	"the ways this game's dedicated server can be run (variants): separate editions of the game with their own server, " +
+	"crossplay builds, or notably different server images. For each variant give:\n" +
 	"- images: Docker Hub images that run this server, best first (prefer images that run as a non-root user, and the " +
 	"plain SteamCMD route cm2network/steamcmd when the game ships a Linux dedicated server on Steam). Only images that " +
 	"appear in the pages.\n" +
@@ -250,13 +250,18 @@ func dedupeHits(hits []searchHit) []searchHit {
 }
 
 func readPage(reader, pageURL string) (string, error) {
+	return readPageLimit(reader, pageURL, 9000)
+}
+
+// readPageLimit reads a page as text through the reader, cut to limit bytes.
+func readPageLimit(reader, pageURL string, limit int) (string, error) {
 	raw, err := httpGet(strings.TrimRight(reader, "/")+"/"+pageURL, 60*time.Second)
 	if err != nil {
 		return "", err
 	}
 	text := string(raw)
-	if len(text) > 9000 {
-		text = text[:9000] + "\n...(truncated)"
+	if len(text) > limit {
+		text = text[:limit] + "\n...(truncated)"
 	}
 	return text, nil
 }
diff --git a/cmd/gbrgames/research_test.go b/cmd/gbrgames/research_test.go
index 28c1a5c..9f39018 100644
--- a/cmd/gbrgames/research_test.go
+++ b/cmd/gbrgames/research_test.go
@@ -4,17 +4,17 @@ import "testing"
 
 func TestPickPagesPrefersDocsAndOnePerSite(t *testing.T) {
 	hits := []searchHit{
-		{URL: "https://blog.example.com/valheim-server"},
-		{URL: "https://github.com/a/valheim-docker"},
+		{URL: "https://blog.example.com/example-server"},
+		{URL: "https://github.com/a/example-docker"},
 		{URL: "https://github.com/b/other"},
-		{URL: "https://hub.docker.com/r/x/valheim"},
-		{URL: "https://blog.example.com/valheim-server"},
+		{URL: "https://hub.docker.com/r/x/example"},
+		{URL: "https://blog.example.com/example-server"},
 	}
 	got := pickPages(hits, 3)
 	if len(got) != 3 {
 		t.Fatalf("got %d pages", len(got))
 	}
-	if got[0].URL != "https://github.com/a/valheim-docker" || got[1].URL != "https://hub.docker.com/r/x/valheim" || got[2].URL != "https://blog.example.com/valheim-server" {
+	if got[0].URL != "https://github.com/a/example-docker" || got[1].URL != "https://hub.docker.com/r/x/example" || got[2].URL != "https://blog.example.com/example-server" {
 		t.Errorf("order: %v", got)
 	}
 }
@@ -26,16 +26,16 @@ func TestTrimToJSON(t *testing.T) {
 }
 
 func TestAppNameFromAppInfo(t *testing.T) {
-	out := `"896660"
+	out := `"1000000"
 {
 	"common"
 	{
-		"name"		"Valheim Dedicated Server"
+		"name"		"Example Dedicated Server"
 		"type"		"Tool"
 	}
 }`
 	m := appName.FindStringSubmatch(out)
-	if m == nil || m[1] != "Valheim Dedicated Server" {
+	if m == nil || m[1] != "Example Dedicated Server" {
 		t.Errorf("got %v", m)
 	}
 }
diff --git a/schema/game.schema.json b/schema/game.schema.json
index 7ba4bf9..d563340 100644
--- a/schema/game.schema.json
+++ b/schema/game.schema.json
@@ -17,7 +17,7 @@
 
     "defaultDockerImage": { "description": "Image the game server runs in.", "type": "string", "minLength": 1 },
     "containerUser": {
-      "description": "uid:gid the server runs as, for images built around their own user (ARK's needs 25000:25000). Defaults to 1000:1000; root is never allowed.",
+      "description": "uid:gid the server runs as, for images built around their own user, as inspect-image reports it. Defaults to 1000:1000; root is never allowed.",
       "type": ["string", "null"],
       "pattern": "^[1-9][0-9]{0,8}:[1-9][0-9]{0,8}$"
     },