There are a lot of maps inside and outside the facility with entertaining voice records that tells the story of what was happening in this place. Well, you can beat it with the flashlight itself but it gives minimum damage. Especially when your flashlight found a silhouette of a rage-induced imp coming your way. This is quite troublesome and exciting at the same time. You can either throw light on dark corners or shoot in the darkness. You have a flashlight by default and any other weapon you've salvaged.
The thing is you can operate with only one item. But the most memorable thing in the game is a flashlight. There is even a survival element as you'll often running around in search of ammo and armor plates. Unlike previous games in the series, this one leans towards horror rather than classic FPS. The game utilizes the idTech 4 engine which was the top-notch game engine at the time. The usual day at the facility goes terribly wrong due to the sabotage and all hell literally broke loose. Doom 3 tells the story of a marine assigned to the research facility on Mars. Back in 2004, this game along with Far Cry and Half-Life 2 introduced gamers to the next generation of shooters.
