Agoura Hills-based THQ said today that its newest gaming title, Homefront, has hit retail stores. The war game--set in the U.S. after an imagined invasion by North Korea--was developed by Kaos Studios, and runs on Xbox 360, Playstation 3, and Windows PCs. THQ has recently been promoting the game through Los Angeles and other parts of California with a rigged up "Pyongyang Express" food truck. The game includes online, multi-player elements.