Yeah the Fallout games are good but be warned that Beth games can be unreliable on PS3.
Souls games I guess are really solo games, but with invasions and summoning. Look it up to understand what I'm talking about. It can be a pain in the arse because these games aren't very easy. I played through Demon's Souls ok with no assistance, but stalled on NG+ (still haven't done everything for all the trophies). Dark souls well I played that solo on 360 and gave up trying to defeat a certain boss duo. It had more to do with my character build than anything else.