Undertow on Xbox Live Arcade for Free

Battle for control of the oceans as one of three selectable races, each with four unique, upgradeable units
Microsoft has announced that b>Undertow, an underwater action-shooter powered by the Unreal Engine 3 and developed by Chair Entertainment Group, will be available free of charge beginning next Wednesday, 2:00 a.m. PST through Sunday, 11:59 p.m. PST. The game will be free for all Xbox LIVE Gold and Silver members. Undertow features two multiplayer modes for up to 16 players, and a robust 15-level single player and co-op campaign. Players navigate the stormy seas as one of four unique, upgradeable unit types ranging in ability from the fast and agile to the large and powerful. Players then earn points for adding upgrades by killing enemies, completing objectives, and taking checkpoints.