diff --git a/titles/chuni/base.py b/titles/chuni/base.py
index c3b9ca2..9e8a634 100644
--- a/titles/chuni/base.py
+++ b/titles/chuni/base.py
@@ -811,6 +811,12 @@ class ChuniBase:
         upsert = data["upsertUserAll"]
         user_id = data["userId"]
 
+        if int(user_id) & 0x1000000000001 == 0x1000000000001:
+            place_id = int(user_id) & 0xFFFC00000000
+            
+            self.logger.info("Guest play from place ID %d, ignoring.", place_id)
+            return {"returnCode": "1"}
+
         if "userData" in upsert:
             try:
                 upsert["userData"][0]["userName"] = self.read_wtf8(
diff --git a/titles/mai2/base.py b/titles/mai2/base.py
index 5a5edb9..a75a94f 100644
--- a/titles/mai2/base.py
+++ b/titles/mai2/base.py
@@ -238,8 +238,10 @@ class Mai2Base:
         user_id = data["userId"]
         upsert = data["upsertUserAll"]
         
-        if int(user_id) & 1000000000001 == 1000000000001:
-            self.logger.info("Guest play, ignoring.")
+        if int(user_id) & 0x1000000000001 == 0x1000000000001:
+            place_id = int(user_id) & 0xFFFC00000000
+            
+            self.logger.info("Guest play from place ID %d, ignoring.", place_id)
             return {"returnCode": 1, "apiName": "UpsertUserAllApi"}
 
         if "userData" in upsert and len(upsert["userData"]) > 0:
diff --git a/titles/mai2/dx.py b/titles/mai2/dx.py
index 0d3bddd..8d6e738 100644
--- a/titles/mai2/dx.py
+++ b/titles/mai2/dx.py
@@ -121,8 +121,10 @@ class Mai2DX(Mai2Base):
         user_id = data["userId"]
         upsert = data["upsertUserAll"]
         
-        if int(user_id) & 1000000000001 == 1000000000001:
-            self.logger.info("Guest play, ignoring.")
+        if int(user_id) & 0x1000000000001 == 0x1000000000001:
+            place_id = int(user_id) & 0xFFFC00000000
+            
+            self.logger.info("Guest play from place ID %d, ignoring.", place_id)
             return {"returnCode": 1, "apiName": "UpsertUserAllApi"}
 
         if "userData" in upsert and len(upsert["userData"]) > 0:
diff --git a/titles/ongeki/base.py b/titles/ongeki/base.py
index 57a7363..e454dc3 100644
--- a/titles/ongeki/base.py
+++ b/titles/ongeki/base.py
@@ -293,7 +293,9 @@ class OngekiBase:
 
     async def handle_upsert_user_gplog_api_request(self, data: Dict) -> Dict:
         user = data["userId"]
-        if user >= 200000000000000:  # Account for guest play
+
+        # If playing as guest, the user ID is or(0x1000000000001, (placeId & 65535) << 32)
+        if user & 0x1000000000001 == 0x1000000000001:
             user = None
 
         await self.data.log.put_gp_log(
@@ -945,6 +947,12 @@ class OngekiBase:
         upsert = data["upsertUserAll"]
         user_id = data["userId"]
 
+        if user_id & 0x1000000000001 == 0x1000000000001:
+            place_id = int(user_id) & 0xFFFC00000000
+            
+            self.logger.info("Guest play from place ID %d, ignoring.", place_id)
+            return {"returnCode": 1, "apiName": "UpsertUserAllApi"}
+
         # The isNew fields are new as of Red and up. We just won't use them for now.
 
         if "userData" in upsert and len(upsert["userData"]) > 0: