Also with what Lenny said Minecraft is also for ipod/iphone/ipad now. Another set of suggestions is Just Cause 2, Kerbal Space Program, and Portal 1&2. Just Cause 2 is a humongous open world fighting game (whole story line with that). Kerbal Space Program is where you can build many different types of rockets and planes. Portal 1&2 is mostly a mind game that is always fun.