Sqdef is a tower defense game for the GP2X handhelds. The goal is to prevent enemies from getting from one side of the map to the other by placing towers along their way. There are over a dozen different buildings with upgrades, tech research, and a whole lot of maps! There's also a built-in editor so you can make your own maps and share them with others. Sqdef won 1st place at the GBAX 2007 Coding Competition and is a GP2X Wiz built-in game.