Shadow Warrior, a first-person shooter game developed by 3D Realms, was released on May 13, 1997, for iPhone. Developed using Ken Silverman's Build engine, it improved on 3D Realms' previous game, Duke Nukem 3D. The game introduced true room-over-room situations, 3D voxels for weapons, transparent water, climbable ladders, and various drivable vehicles.

The gameplay is known for its ultra-violent nature, combined with tongue-in-cheek humor and subtle sexual themes. Mark Adams later ported Shadow Warrior to Mac OS in AugustFans of Duke Nukem 3D will find a familiar yet enhanced experience in this action-packed game, which offers a unique blend of action and humor.