Underwater Attack

Underwater Attack (Nintendo DS) is a side-scrolling shoot 'em up set in a flooded future Earth. You pilot a high-tech underwater fighter to battle the evil Chaos Empire and stop their doomsday weapon, the Crimson Star. The game features 360° stylus-based aiming, over 10 upgradeable weapons, and more than 20 levels. It includes Mission and Survival modes, though its touch-screen controls and difficulty may not suit all players.