diff --git a/src/main.rs b/src/main.rs
index 525fcdf..8af25b0 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -241,6 +241,10 @@ fn main() -> anyhow::Result<()> {
                     return Ok(());
                 }
 
+                LauncherState::PredownloadAvailable { .. } if run_game => {
+                    return Err(anyhow::anyhow!("Predownload available. Use --just-run-game to run anyway, or open the UI to download it"));
+                }
+
                 _ => ()
             }
         }