Robert Cody

Robert O. Cody (or Bob Cody) was a maintenance technician and the head of a maintenance team assigned to Caverns Area 1 on Mars during the events of Doom 3. A month before the demonic invasion, Cody and his team were sent to the caverns to repair the power generators. However, while in the caverns, they were constantly plagued by mysterious "howlers", earthquakes (or Mars-quakes) accompanied by inexplicable screaming. After ten days of working, Cody and his men stopped working, refusing to resume their current assignment until someone figured out what was causing the howlers.

Cody was presumably killed in the demonic invasion. His PDA can be found on a table in the B1 Conference Room in Caverns Area 1. There is a skeleton nearby which may be his. Cody's PDA is the last collectible PDA in the game, not counting the id Software PDA found in the last level.