Moon Rocks is an impressive little shooter-defense game that's pretty challenging and fun. Loosely inspired by the classic arcade game Missile Command, you defend your little chunk of the planet's surface from an onslaught of asteroids, ice comets, enemy ships and plenty of other things that threaten to turn your base into Swiss cheese.

MAD: Mutually Assured Destruction is a souped-up rendition of Missile Command with great art by Brad Baum and clever resource management design by Nic Daniel. Shoot missiles in an attempt to intercept other missiles, just like in the classic arcade game, but with a twist: Each missile you fire garners some resources that can be spent to upgrade buildings.