The "high definition" remake of Serious Sam: The First Encounter is being released tomorrow on Steam! Watching the trailer for this game should bring back some fond memories for anyone familiar with this title. I'll probably pick it up very soon, as I remember having a blast with the original. At only $20, what is there to lose?
Speaking of $20 games, I still highly recommend Torchlight. I have yet to beat it, simply because I did a terrible job of creating my original character, therefore making her too weak to defeat the final boss (as embarrassing as that is to say). Oh, and the "Hard" difficulty is just that. It was a breeze early in the game, but the final levels are murder! Anyways, I created a new character and have pumped her up with all the right stats (she's now a death-bringing tank). The other character classes are just as fun to play, and I look forward to spending more time with them.
Hopefully other equally great games will come out at this price point. With the price of most games today eclipsing $50 or $60, it's hard to justify not picking up a cheap, fun title to play for the upcoming holidays.