DOOM comes to mobile devices as a first person shooter (FPS) game. Doom RPG incorporates many elements of the original game, but was designed with the limitations of the platform in mind. However, It looks extremely well done and is designed to play like everyone's favorite favorite FPS. You can get UAC credits and buy ammo and health, interact with scientists, and level up your character. The coolest aspect by far is all the new enemies, each with it's own class and 3 different strengths. But DoomRPG mobile version is no multiplayer mode, which sucks.