Play Defcon free this weekend - till 6pm GMT Monday

Win-OSX-Linux online multi-player (or single player) strategy game

PC world said: "Through 6 p.m. GMT on Monday, August 27, Defcon is free for all to play; gamers are not required to enter key codes to have access to the full game.

Defcon is a throwback to the Cold War. Your job, as a general hidden in a deep underground bunker, is to totally destroy the other side - inflicting massive civilian casualties and disarming your opponent using a thermonuclear arsenal, trying to protect your own forces and people as best you can.

If the game sounds disturbing, it is -- its tagline is "Everybody Dies," and Introversion and Ambrosia don't shy away from showing you the dark side -- and the reality -- of global nuclear conflict."

59MB download
If you decide you like annihilating the world, it's $25 for a license after Monday.

[While you're at that website, you may notice that Ambrosia software also makes Snapz Pro, which is a tempting screen capture utility for OS X, but I like SnapNDrag and iShowu better and they cost a lot less. The Firefox extension PageSaver does a great job of capturing long web pages in one shot too.]