Windows 7: Fallout 3

I ran and beat the game in Windows 7 with no issues, I'm using Nvidia and 8800GT with a 2.2GHz proc and 1G ram. It ran pretty smooth (even with single core I could put the graphics up pretty decent). I'd say the game runs pretty well, I had the stand alone DVD so I can't say for the Steam version but it should run the same... Though steam is a finiky program at times.