Ivan 
Top 20 games played on Steam Deck in the April 2024, sorted by playtime
5714Ok, what am I doing wrong that Fallout 3 isn’t working? It just crashes on start.
shinratdrWhen I got the Steam Deck I had to install and set up FNV. Once I did that, F3 would work. I would have assumed they had fixed that since then but maybe not? Worth a try.
FNV worked OOTB.
They are saying that once Fallout New Vegas was installed FO3 also installed fine