T. Brooks

"Welcome to the dungeon, Marine, most unexciting place on Mars."

- T. Brooks

T. Brooks was a security guard character in Doom 3 located in the Mars City Underground. He welcomes the Marine upon his entry into the Underground, calling it the most unexciting place on Mars.

Brooks permits the player access to a security locker containing a pistol, armor and a flashlight. He tests the radio and warns him to not pull the trigger as civilians are working around the area.

When the Doomguy gets into his office after the demonic invasion, Brooks seems to be dead but he has actually been turned into a shotgun-wielding Z-Sec, and the player has to kill him. After this, the player opens the other security locker and the door to the elevator.

He seems to be very well known in Mars City Underground as he is found in every PDA of all the UAC employees in that area, most likely because he's the only one who can permit entry to the underground.

Trivia

 * If you discharge your pistol when you first receive it, Brooks will flinch and yell at you to be careful.