Steam News announces the release of a Windows edition of Iron Brigade, confirming last month's speculation that a Steam release of Double Fine's tower defense/shooter was in the works. The game is on sale for the next week for 20% off single copies and four-packs, and here's word:

Join The Mobile Trench Brigade and protect humanity from the evil Monovision menace in this Tower Defense Shooter from Tim Schafer's Double Fine Productions! Use a combination of mobile firepower and stationary defenses to turn the tide of war in our favor. Customize your trench with thousands of possible loadouts. March side-by-side with allies from around the world as you fight your way through Europe, Africa, and the Pacific.