diff --git a/titles/chuni/base.py b/titles/chuni/base.py
index 2a26118..83086ff 100644
--- a/titles/chuni/base.py
+++ b/titles/chuni/base.py
@@ -809,6 +809,10 @@ class ChuniBase:
         upsert = data["upsertUserAll"]
         user_id = data["userId"]
 
+        if int(user_id) & 281479271677952 == 281479271677952:
+            self.logger.info("Guest play, ignoring.")
+            return {"returnCode": "1"}
+
         if "userData" in upsert:
             try:
                 upsert["userData"][0]["userName"] = self.read_wtf8(