Well, there may a lot of reasons that could have resulted in the steam crashing on startup. In short, you won’t be able to enter the game and play it as usual on your PC like before. Some of the players have said the fallout 4 keeps crashing right after launching it while others claimed that it was crashing on the loading screen. You may already notice the issue on your PC since it’s happening to pretty much every other steamfallout 4 players. Most of the players in the community have reported the crashing of the game upon launch or startup or sometimes fallout 4 crashes randomly. The fallout 4 current version, recent updates, and patches have made the game way more buggy and glitchy than it was initially. What Causes Fallout 4 To Crash On Startup? Method 5:- Reinstall Fallout 4 Game On Your PC.Method 4:- Install Driver Easy To Update Drivers.Method 3:- Verify The Integrity Of Game Files.