The very fine tower defense game, Plants vs Zombies, is on sale as Xbox LIVE's deal of the week. Defend your yard from the encroaching zombie hordes with plants like the Peashooter, the Cherry Bomb, and the Doom-Shroom. Normally 1200 MSP ($15), Plants vs Zombies can be purchased for 800 MSP ($10) from now until January 24th. We really like this game, and gave it a 4 out of 5 in our Co-Op review. You and a friend can team up locally in Adventure Co-Op Mode or the refined Co-Op Mode. If you have been on the fence about this one, what are you waiting for? This might be the closest some of you get to actually having your own lawn. True, it's infested with zombies, but at least you don't have to mow it.