diff --git a/docs/superpowers/contracts/steam-backlog-protected-ids-2026-05-14.json b/docs/superpowers/contracts/steam-backlog-protected-ids-2026-05-14.json
new file mode 100644
index 0000000..6790285
--- /dev/null
+++ b/docs/superpowers/contracts/steam-backlog-protected-ids-2026-05-14.json
@@ -0,0 +1,14 @@
+{
+  "title": "Steam backlog enforcer protected app IDs expansion 2026-05-14",
+  "objective": "Prevent steam_backlog_enforcer from uninstalling four additional Steam app IDs that the user wants preserved across enforcement cycles.",
+  "acceptance_criteria": [
+    "PROTECTED_APP_IDS in game_install.py contains the four new IDs (1410710, 10500, 813780, 489830) in addition to existing entries.",
+    "Existing tests that patch PROTECTED_APP_IDS continue to pass without modification.",
+    "No other behavior of game_install.py changes."
+  ],
+  "out_of_scope": [
+    "Changing enforcement scheduling or HLTB matching.",
+    "Modifying state.json or any persisted enforcement state."
+  ],
+  "verifier": "Static review of the four-line addition plus pre-commit ruff/mypy/pylint hooks on game_install.py"
+}
diff --git a/docs/superpowers/evidence/steam-backlog-protected-ids-2026-05-14.json b/docs/superpowers/evidence/steam-backlog-protected-ids-2026-05-14.json
new file mode 100644
index 0000000..7da11b1
--- /dev/null
+++ b/docs/superpowers/evidence/steam-backlog-protected-ids-2026-05-14.json
@@ -0,0 +1,26 @@
+{
+  "intent": "Add four Steam app IDs to PROTECTED_APP_IDS so steam_backlog_enforcer never uninstalls them during enforcement.",
+  "scope": [
+    "python_pkg/steam_backlog_enforcer/game_install.py",
+    "Non-goal: changing tests, enforcement loop, or any persisted state"
+  ],
+  "changes": ["Added 1410710, 10500, 813780, 489830 to PROTECTED_APP_IDS set."],
+  "verification": [
+    {
+      "command": "git diff python_pkg/steam_backlog_enforcer/game_install.py",
+      "result": "pass",
+      "evidence": "Diff shows only +4 lines inside PROTECTED_APP_IDS literal; no other lines touched."
+    },
+    {
+      "command": "grep PROTECTED_APP_IDS python_pkg/steam_backlog_enforcer/tests/*.py",
+      "result": "pass",
+      "evidence": "Tests patch the set, so set membership changes do not affect test outcomes."
+    }
+  ],
+  "risks": [
+    "If the user later wants one of these IDs enforced again, they must be removed manually from the set."
+  ],
+  "rollback": [
+    "Revert this commit; PROTECTED_APP_IDS returns to prior contents."
+  ]
+}
diff --git a/python_pkg/steam_backlog_enforcer/game_install.py b/python_pkg/steam_backlog_enforcer/game_install.py
index 32311d7..8783487 100644
--- a/python_pkg/steam_backlog_enforcer/game_install.py
+++ b/python_pkg/steam_backlog_enforcer/game_install.py
@@ -90,6 +90,10 @@ PROTECTED_APP_IDS = {
     1158310,
     440,
     1142710,
+    1410710,
+    10500,
+    813780,
+    489830,
 }
 
 STEAMAPPS_PATH = Path("~/.local/share/Steam/steamapps").expanduser()