diff --git a/gamefixes-steam/1245620.py b/gamefixes-steam/1245620.py
new file mode 100644
index 00000000..59e72a18
--- /dev/null
+++ b/gamefixes-steam/1245620.py
@@ -0,0 +1,10 @@
+"""Game fix for Elden Ring: Manually create the `DLC.bdt` file to work around the "Inappropriate activity detected" error for players that don't own the DLC"""
+
+from pathlib import Path
+from protonfixes import util
+
+def main():
+	if not Path(f"{util.get_game_install_path()}/Game/DLC.bdt").exists():
+		# Create the DLC.bdt file if it doesn't already exist, which is known to fix Easy AntiCheat not working for players that don't own the DLC
+		# A blank file is enough to get multiplayer working
+		open(f"{util.get_game_install_path()}/Game/DLC.bdt", 'wb').close()