I was having save problems alot, like 2 game 5 saves and 2 game 6 saves, also was seeing old auto save from early part of game at top. I ran a reg fix program and saw steam showing up 4 error's everytime. I fixed errors and deleted unwanted saves, seems to work well for a while, so I'd say Steam is prob. got some issue's. Serious game lock up in steam room meeting informant, something Luxe casino where all wear mask's, did multiple saves in that part to get thru it,once out of steam room game played fine,? New issue now is Fort Mc below strip did quest's all handed in but can't get the guy to let me talk about killing Motor guy the chain saw leader of Fiends in vault 3, which also prevents me from getting exp. for final quest of other Fort that sent me there to ask for support troops. Damn it. : (