Basically, post links to fun games you've played, but they have to be free.
Newgrounds is an excellent source for such things. I just finished Arrival in Hell a nasty little horror point and click game set in a prison that's become the hunting ground of a monster.
Quake Live is great and free. Basically it's free online Quake 3. Sonny 2 is a pretty good flash RPGs at www.armorgames.com. Also to my knowledge Combat Arms is free. Thats another free FPS like quakelive. Lots of good stuff at New Grounds also.
Ahh Pandemic. It's New Zealand that gets me every time.
I think I linked to this site on the thread about the hail game. Also I am a fan of Auditorium, aaaand I have to confess I actually spend quite a lot of time on Facebook scrabble *looks sheepish*
Oh yeah, I really enjoy Quake Live -- incredible to think that only a few years ago it needed a top of the range PC to run and now it's a browser applet.
from teh recent ones i played i enjoyed enigma. its a marble puzzle game where you uncover the matching oxyd stones and solve a few puzzles along the way.
and within a deep forest a 2d platform game with enjoyable atmosphere and nice gameplay
Toribash for the unholy things you can do with people's body parts. (Note to self: Mod idea, genitals, so you can pull them off..) best fighting game ever.
* Bloxorz (via Warren): Puzzle game, maze-without-walls. * The GROW Series (links down the left sidebar, or sorted by popularity here, although I'd put CUBE at the top): Cause/effect games.
White Butterfly - "Shoot-em-up game with strange 8-bit pastel colours and partly random music." adn two oldies: "Defeat autocreated huge battleships. Shootem up game: rRootage" Warning Forever - a 2d shooter where the bosses evolve according to your attack.
Almost anything you find here Digipen has people make games and post them as finals. Favorites are Tag and Narbacular Drop (you might know it as the inspiration for Portal). Tag is probably the best one, in my opinion.
@Ariana-Cube was awesome. I also enjoyed the hell out of RPG