Doom³

Sergeant Thomas Kelly (voice)

Dr. Malcolm Betruger (voice)

Jack Campbell (voice)

Councilor Elliot Swann (voice)

Computer / Theresa Chazar (voice) (as Grey DeLisle)

Video Logs / Additional Voices (voice)

Additional Voices (voice)

Additional Voices (voice)

K. Miller / Additional Voices (voice) (as Steven Jay Blum)

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IPN newscaster / Additional Voices (voice)

Dr. Richard Davies / Henry Nelson / Richard Price (voice)

Additional Voices (voice)

Additional Voices (voice)

E. Grafton / Additional Voices (voice)

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Additional Voices (voice)

Additional Voices (voice)

Additional Voices (voice) (as Phil La Marr)

Additional Voices (voice)

Additional Voices (voice)

Additional Voices (voice)

Research Director Larry Bullman (voice)

Additional Voices (voice)

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Dr. Jonathan Ishii / Additional Voices (voice)

The name of the doctor responsible for the disaster is Dr. Malcolm Betruger. The German word "Betrüger" means "Cheater" in English. Id Software always tried to prevent cheating in the multiplayer mode of their games. So the bad-guy of Doom3 is a cheater and in reverse cheaters are bad-guys.

In the original Doom, the player lost all their equipment (except for a pistol and 50 bullets) at the beginning of every new episode (for a total of two times). Although no reason was given for this effective "restart" in every chapter, the concept was carried over into Doom 3, and the player loses all their equipment (twice), on the journey to and from Hell. There are also several other holdovers from the original doom, such as a boss fight that consisted of two Barons of Hell, toxic sludge, and more.

The Alpha version of this game and the final version are different. The difference are : The invasion of the Hell troops are showed in the openingThe doomguy actually speaks at the beginning of the levelThere are no object physiscs in the Alpha. The zombies can get back up even when you shot them to death

After turning on the air filtration system at Recycling Sector 2, the marine still coughs, when passing by a vent, as if there still would be toxic gases spreading out.

Many levels appear to overlap each other. A good example of this is the "Central Processing" level, where many areas of the map appear to overlap where areas in the previous level, "Delta Complex", would have been.

Mars's gravity is only 45% as strong as Earth's gravity, yet the Marine when outside of com-pressurized buildings walking on Mars's surface, is still walking on the ground as if there is no difference in strength of gravity

Sarge: [as the boss, Saboath] On your knees, soldier!

Betruger: Destroy him!

Soul Cube: [after it becomes fully charged] Use us! Is this interesting? Interesting? Yes No | Share this Share this: Facebook  |  Twitter  |  Permalink Hide options Sarge: [comes on the radio after DoomGuy enters an airlock and opens the other end] Marine, get your ass to the Communications facility as quickly as possible! You gotta get that message to the fleet!