Once again, shock of all shocks, the Steam holiday sale has some great stuff in it. Here's my picks for today:
Audiosurf: $2.49 - This was one of the first (if not the first) games to generate some important facet of the game from music files. I bought it for full price back in the day when it first released and really enjoyed it then, and years later I still fire it up on occasion. The game is a puzzle racer where you collect colored blocks and make patters with them through a course generated off the song you're playing. At $2.49 it's well-worth the meager price they're asking for it today, and its one of those things that belongs in every PC game collector's library. Mellow tracks make an easier race course, heavier, up-tempo music is more challenging.
Frozen Synapse: $3.74 - One of the coolest and most surprising game experiences a lot of folks, myself included, have had this year. Frozen Synapse is a great simultaneous turn-based tactical game. It's very hard, but very rewarding. I hear the multiplayer is even more fun than the single-player, but I've yet to try that. Still, for under $4, it's not bad.
E.Y.E.: Divine Cybermancy: $2.49 - This isn't a great game by any stretch of the imagination, but it is an interesting one to fiddle around with. I don't think I'd recommend it for a higher price than it's currently at, but for $2.49, it's worth getting to poke at.
What I'm getting: I picked up Rage, since it's dropped to half its original price and then dropped to half of that in the sale. I've been wanting to play it, but not for $60.