The fast-paced action of 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. The non-stop conquest-style battles of Undertow push the envelope of on-screen effects and combat action with stunning graphics and special effects.