Video Games

Shadowbane
Huge character base to choose from. Massive online multiplayer game where you choose your character from different races and you upgrade their skills. Huge world and a lot of fun.
http://www.fileplanet.com/130645/130000/fileinfo/Shadowbane-Free-Game-[Win32]-(US-&-Canada-Only)

Rune Scape
Just as big as World of Warcraft and with the same game play.
It runs in your web browser, so there's no need for gaming hardware.
http://www.runescape.com/

N
Creative ninja game.
http://www.thewayoftheninja.org/n.html

Desktop Tower Defense
This game is simple but really fun. FYI you click on the type of tower you want then select where on the desktop you want to place it.
http://www.handdrawngames.com/DesktopTD/game.asp

Psychonauts (Free til December 31, 2008)
game where you go into the depths of other characters' minds, attempting to fix their innumerable psychological problems.
http://www.gametap.com/home/play/gameDetails/000475950

Commandos 3: Destination Berlin (Free til December 31, 2008)
Stealth and secrecy are your tools across 10 missions in which you'll control a squad of elite commandos in real time.
http://www.gametap.com/home/play/gameDetails/000241750

Sam & Max Season One: Episode 4: Abe Lincoln Must Die! (Free til December 31, 2008)
What starts out as a typical job rescuing the President of the United States from a dastardly plot takes a bizarre turn when a three-story statue of Abraham Lincoln begins terrorizing the populace! Abe Lincoln Must Die, and it's up to Sam & Max to make it happen!
http://www.gametap.com/home/play/gameDetails/131000450

Hitman: Codename 47 (Free til December 31, 2008)
You are Agent 47, a trained killer for hire. Your history? That's a need to know basis. Stealth and cunning are your allies as you stalk and eliminate your victims with a variety of lethal weapons.
http://www.gametap.com/home/play/gameDetails/000488050