Not...
I wish I could return games on steam, even if the game only set me back £2.50.
As a game, Metro 2033 is good, very good. But what sucks, hard, is the half assed save system. There's no manual save system, I can't even select chapters I've already have cleared because my latest and only "auto save" has gone kaput...
The only way forward now is to start a new game and replay the game 7 hours back to where I was before, while that's not the biggest issue, it's replaying those bloody stealth missions again, where the game will inexplicably auto save the second I'm spotted.
I'm disappointed, I don't think I can bring myself to play this game again.