The father of FPS games, DOOM, is finally here. In one of the first first-person shooter games, you play as a space marine shooting down the hellish enemies. There are three different levels available to choose from that you can play and each differs from the others. If you are new to this game there are also five varying difficulties that will affect your ammo, the level of monsters, and if you choose Nightmare! the monsters will respawn. Walk through the game using W and S while rotating the screen with A and D. Pick up armour and health that will be laying on the floor to protect your character. There will also be different guns able to be picked up as well as ammo for the guns. Have fun reliving your childhood by playing DOOM on 9unblocked!