The promised beta testing of Infested Planet is now underway for anyone who preorders either the Windows or OS X edition of the RTS game. The website offers a new trailer from the game, and here's word on what this is all about: "Infested Planet is a tactical RTS where you annihilate 100,000 swarming aliens with a crack marine team of 5. You have to flex your strategic muscle as the aliens mutate and evolve."