Steam is just amazing, cheap, fast & reliable. I don't see why too many people see it as bad. It houses my favorite games, it is a very nice gamer utility which in my opinion, is better than Xfire (in my case).
Now to the games:
- Dark Crusade:
- Grand Theft Auto Collection (Steam rocks):
- Mass Effect:
Those are the most recent. Holiday games you ask? You probably already found out.