diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
index 64df75b..2e2b6e1 100644
--- a/.github/workflows/validate.yml
+++ b/.github/workflows/validate.yml
@@ -39,6 +39,9 @@ jobs:
       - name: Check flush-only backup capabilities
         run: python3 test-backup-capabilities.py
 
+      - name: Check placement of amd64-only game images
+        run: python3 test-game-placement.py
+
       - name: Run module preflight validator
         run: python3 validate.py
 
diff --git a/.schema/gametemplate.schema.json b/.schema/gametemplate.schema.json
index f286e39..cbd649d 100644
--- a/.schema/gametemplate.schema.json
+++ b/.schema/gametemplate.schema.json
@@ -1822,6 +1822,12 @@
             }
           ]
         },
+        "requiredNodeArchitecture": {
+          "description": "RequiredNodeArchitecture is the kubernetes.io/arch label required by\nthe game executable (for example, amd64). Omit for portable templates.\nThe requirement also applies to version selections and image overrides.",
+          "maxLength": 63,
+          "pattern": "^[a-z0-9]+$",
+          "type": "string"
+        },
         "resources": {
           "description": "Resources are the default compute resources for the game container.",
           "properties": {
diff --git a/README.md b/README.md
index a85bc70..9781afd 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,20 @@ OCI game templates for Gameplane. Each `<name>/` folder holds `module.yaml`,
 `template.yaml`, `README.md` and optional `icon.png`, `specs.md`, `samples/`.
 `build.sh push` publishes them; `validate.py` preflight-checks them in CI.
 
+## Mixed-architecture clusters
+
+Squad, The Isle, Mount & Blade II: Bannerlord, Nuclear Option and ARK: Survival
+Evolved pin Linux amd64 images. Their templates require an amd64 game worker.
+Before installing these revisions, upgrade the GameTemplate CRD and operator to
+a release that supports `spec.requiredNodeArchitecture`. This also applies when
+installing a template directly with `kubectl apply`, which bypasses the module
+version check.
+
+Existing module digests retain their original placement rules. Until you
+upgrade those templates, set `spec.nodeSelector` on the affected GameServers
+to include `kubernetes.io/arch: amd64` and ensure the selected worker can mount
+the game's persistent volumes.
+
 ## Translations
 
 A module can ship translations in `<name>/locales/<tag>.json` (flat JSON,
diff --git a/ark-survival-evolved/module.yaml b/ark-survival-evolved/module.yaml
index a6fc99c..0ef2d4e 100644
--- a/ark-survival-evolved/module.yaml
+++ b/ark-survival-evolved/module.yaml
@@ -2,10 +2,10 @@
 apiVersion: gameplane.local/module/v1
 name: ark-survival-evolved
 displayName: "ARK: Survival Evolved"
-version: 2.0.1
+version: 2.0.2
 game: ark-survival-evolved
 categories: [Survival, Open World, Multiplayer, Dinosaurs]
 summary: "ARK: Survival Evolved with Source RCON, cluster travel, and persistent worlds. For 1.x upgrades, stop and back up first. Move 1.0 saves to /app/server/ShooterGame/Saved or the 1.1 install to /app/server, and transfers to /cluster."
 homepage: https://survivetheark.com/
 license: MIT
-gameplaneMinVersion: 0.2.0-beta.7
+gameplaneMinVersion: 0.4.1
diff --git a/ark-survival-evolved/template.yaml b/ark-survival-evolved/template.yaml
index 4cee272..b91b98f 100644
--- a/ark-survival-evolved/template.yaml
+++ b/ark-survival-evolved/template.yaml
@@ -20,7 +20,8 @@ metadata:
 spec:
   displayName: "ARK: Survival Evolved"
   game: ark-survival-evolved
-  version: 2.0.1
+  version: 2.0.2
+  requiredNodeArchitecture: amd64
   categories: [Survival, Open World, Multiplayer, Dinosaurs]
   accentColor: "#00b2e2"
   description: |
diff --git a/mount-and-blade-2-bannerlord/module.yaml b/mount-and-blade-2-bannerlord/module.yaml
index 111da67..15ff607 100644
--- a/mount-and-blade-2-bannerlord/module.yaml
+++ b/mount-and-blade-2-bannerlord/module.yaml
@@ -2,10 +2,10 @@
 apiVersion: gameplane.local/module/v1
 name: mount-and-blade-2-bannerlord
 displayName: "Mount & Blade II: Bannerlord"
-version: 1.1.0
+version: 1.1.1
 game: mount-and-blade-2-bannerlord
 categories: [Action, RPG, Medieval, Multiplayer]
 summary: "Mount & Blade II: Bannerlord dedicated multiplayer server with PTY console and match-based skirmish hosting."
 homepage: https://www.taleworlds.com/en/Games/Bannerlord
 license: MIT
-gameplaneMinVersion: 0.2.0-beta.7
+gameplaneMinVersion: 0.4.1
diff --git a/mount-and-blade-2-bannerlord/template.yaml b/mount-and-blade-2-bannerlord/template.yaml
index 11db2e5..8455064 100644
--- a/mount-and-blade-2-bannerlord/template.yaml
+++ b/mount-and-blade-2-bannerlord/template.yaml
@@ -16,7 +16,8 @@ metadata:
 spec:
   displayName: "Mount & Blade II: Bannerlord"
   game: mount-and-blade-2-bannerlord
-  version: 1.1.0
+  version: 1.1.1
+  requiredNodeArchitecture: amd64
   categories: [Action, RPG, Medieval, Multiplayer]
   accentColor: "#b45309"
   description: |
diff --git a/nuclear-option/README.md b/nuclear-option/README.md
index 9901033..7496f4b 100644
--- a/nuclear-option/README.md
+++ b/nuclear-option/README.md
@@ -82,5 +82,5 @@ Backups capture the entire `/data` volume, so the game config and the ban list (
 
 ## Version
 
-- **Module version**: 1.1.0
-- **Requires Gameplane**: ≥ 0.2.0-beta.7
+- **Module version**: 1.1.1
+- **Requires Gameplane**: ≥ 0.4.1
diff --git a/nuclear-option/module.yaml b/nuclear-option/module.yaml
index 379c92a..25b8a4b 100644
--- a/nuclear-option/module.yaml
+++ b/nuclear-option/module.yaml
@@ -2,10 +2,10 @@
 apiVersion: gameplane.local/module/v1
 name: nuclear-option
 displayName: Nuclear Option
-version: 1.1.0
+version: 1.1.1
 game: nuclear-option
 categories: [Simulation, PvP]
 summary: Nuclear Option dedicated server with remote-command console, runtime-downloaded via SteamCMD.
 homepage: https://www.nuclearoption.com/
 license: MIT
-gameplaneMinVersion: 0.2.0-beta.7
+gameplaneMinVersion: 0.4.1
diff --git a/nuclear-option/template.yaml b/nuclear-option/template.yaml
index 9cacac6..0b40a52 100644
--- a/nuclear-option/template.yaml
+++ b/nuclear-option/template.yaml
@@ -28,7 +28,8 @@ spec:
   displayName: Nuclear Option
   game: nuclear-option
   # Kept in lockstep with module.yaml's bundle version.
-  version: 1.1.0
+  version: 1.1.1
+  requiredNodeArchitecture: amd64
   categories: [Simulation, PvP]
   # Brand color for the dashboard.
   accentColor: "#ff6b6b"
diff --git a/squad/module.yaml b/squad/module.yaml
index c4aad39..1263954 100644
--- a/squad/module.yaml
+++ b/squad/module.yaml
@@ -2,10 +2,10 @@
 apiVersion: gameplane.local/module/v1
 name: squad
 displayName: Squad
-version: 1.1.0
+version: 1.1.1
 game: squad
 categories: [Shooter, Tactical, Military, Multiplayer]
 summary: Squad dedicated server (Unreal Engine 4) with Source-family RCON console, match-based rotation, and Steam Workshop modding support.
 homepage: https://joinsquad.com/
 license: MIT
-gameplaneMinVersion: 0.2.0-beta.7
+gameplaneMinVersion: 0.4.1
diff --git a/squad/template.yaml b/squad/template.yaml
index 464acdc..6481fab 100644
--- a/squad/template.yaml
+++ b/squad/template.yaml
@@ -16,7 +16,8 @@ metadata:
 spec:
   displayName: Squad
   game: squad
-  version: 1.1.0
+  version: 1.1.1
+  requiredNodeArchitecture: amd64
   categories: [Shooter, Tactical, Military, Multiplayer]
   accentColor: "#2d3748"
   description: |
diff --git a/test-game-placement.py b/test-game-placement.py
new file mode 100644
index 0000000..aee234f
--- /dev/null
+++ b/test-game-placement.py
@@ -0,0 +1,20 @@
+"""Keep the audited x86 game images on compatible workers."""
+
+from pathlib import Path
+import unittest
+
+import yaml
+
+
+class GamePlacementTest(unittest.TestCase):
+    def test_amd64_only_games_require_amd64_workers(self):
+        for game in ("ark-survival-evolved", "mount-and-blade-2-bannerlord",
+                     "nuclear-option", "squad", "the-isle"):
+            with self.subTest(game=game):
+                path = Path(__file__).parent / game / "template.yaml"
+                spec = yaml.safe_load(path.read_text(encoding="utf-8"))["spec"]
+                self.assertEqual(spec.get("requiredNodeArchitecture"), "amd64")
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/the-isle/module.yaml b/the-isle/module.yaml
index f4472bf..21b0894 100644
--- a/the-isle/module.yaml
+++ b/the-isle/module.yaml
@@ -2,10 +2,10 @@
 apiVersion: gameplane.local/module/v1
 name: the-isle
 displayName: The Isle
-version: 1.1.0
+version: 1.1.1
 game: the-isle
 categories: [Survival, Dinosaurs, Open World, Multiplayer]
 summary: The Isle dedicated server (Unreal Engine 4) with Source RCON remote administration and persistent world save management.
 homepage: https://findtheisle.com/
 license: MIT
-gameplaneMinVersion: 0.2.0-beta.7
+gameplaneMinVersion: 0.4.1
diff --git a/the-isle/template.yaml b/the-isle/template.yaml
index 2d03003..b20603c 100644
--- a/the-isle/template.yaml
+++ b/the-isle/template.yaml
@@ -16,7 +16,8 @@ metadata:
 spec:
   displayName: The Isle
   game: the-isle
-  version: 1.1.0
+  version: 1.1.1
+  requiredNodeArchitecture: amd64
   categories: [Survival, Dinosaurs, Open World, Multiplayer]
   accentColor: "#22543d"
   description: |