Doom 3 is a Sci-Fi horror game set in the future your character a marine has been sent to mars, however when you get there things do not seem right, many people are upset,paranoid and are in constant fear. You soon find out when you are ordered to find a missing personel, who has tracked what has been going on in the base, it soon erupts when the whole Mars base goes to hell and the portal of hell opens and demons are let loose.
This is an intense game, the detail of the levels is revolutionary, the lighting and the sounds all add up to the gameplay, it is meant to scare you at parts. It does do this.
The monsters are detailed, and different monsters are introduced throughout the game, the further you get in the game the harder the monsters will be, however it even's out with the more span of guns available like the BFG, Rocket launcher and plasma gun. These are just a few of the many weapons.
Overall I gave this game 10/10 because ID did a really good job on this game and it was long lasting gameplay for me.