diff --git a/nucon/model.py b/nucon/model.py
index 85fd6a1..976611b 100644
--- a/nucon/model.py
+++ b/nucon/model.py
@@ -166,8 +166,17 @@ class NuconModelLearner:
                                    'ALARMS_ACTIVE', 'FUN_IS_ENABLED', 'GAME_SIM_SPEED'})
         candidate_params = {k: p for k, p in self.nucon.get_all_readable().items()
                             if k not in _JUNK_PARAMS and p.param_type != str}
-        # Filter out params that return None (subsystem not installed)
-        test_state = {k: self.nucon.get(k) for k in candidate_params}
+        # Filter out params that return None (subsystem not installed).
+        # Retry until the game is reachable.
+        import requests as _requests
+        while True:
+            try:
+                test_state = {k: self.nucon.get(k) for k in candidate_params}
+                break
+            except (_requests.exceptions.ConnectionError,
+                    _requests.exceptions.Timeout):
+                print("Waiting for game to be reachable…")
+                time.sleep(5)
         self.readable_params     = [k for k in candidate_params if test_state[k] is not None]
         self.non_writable_params = [k for k in self.readable_params
                                     if not self.nucon.get_all_readable()[k].is_writable]