Great game First Fps i ever played as a young kid and its still great. If u liked DOOM DOOM 2 and Plutonia Experiment(3rd DOOM) youll love this. same gameplay as doom games but heres the FPS Revolution that this game introduced first game u can look up and down save items in an inventory for later use and FLY! The game made steps toward the advancement of FPS games and one other big difference betwen this and DOOM: U CAN EXPLORE ALL AREAS AND KILL ALL MONSTERS WITH LIMITED THREAT OF RUNNING OUT OF AMMO!!!!! (even when played on the hardest difficulty.) in DOOM if u kill every monster on every level and find evey item ur out of ammo by level 15 i like not having to run away when demons deserve to die!