Real life violence is a bad thing. In fact, I think that violence is just about the worst way to solve a problem. But I also believe that video games are good and can be a healthy thing. Here are a few worth checking out:
These games are open and free, and they run great on Linux or Windows. I've been known to play them all in my free time.
UrbanTerror is a counterstrike like clone, though it adds some new features like jumps and leaps. Its an online 3d multiplayer tactical shoot em up. Happily its free and the server network is open.. no big brother Valve spying on you with Steam whenever you want to play a game of counterstrike.
Nexuiz is a fast paced first person shooter with old school deathmatch style gameplay. This game is fast.
PokerTH is a texas holdem poker engine. You can play the computer, or go online and play against real people.
