You play as a newly arrived assigned to security. The atmosphere is tense; the base is plagued by mechanical failures, "ghostly" sightings, and a workforce on the edge of a nervous breakdown. Tensions are high between the base administrator, Elliott Swann , and the lead scientist, Dr. Malcolm Betruger , over mysterious experiments conducted in the Delta Labs. The Inciting Incident
: As you fight through the facility, you discover ruins of an ancient Martian civilization that once fought the same demonic forces. They created a weapon called the Soul Cube , which you must recover from Hell to seal the portal. DOOM 3 (v1.3.1) [GOG]
: Unlike the "run-and-gun" style of other entries, the DOOM 3 story emphasizes isolation and darkness. You play as a newly arrived assigned to security
: You eventually learn that Dr. Betruger has defected to the side of Hell, orchestrating the invasion in exchange for power. Malcolm Betruger , over mysterious experiments conducted in
: The Marine must travel into the heart of Hell, defeat the Cyberdemon guarding the primary "Hell Hole," and use the Soul Cube to close the gateway. Version 1.3.1 [GOG] Specifics
: Set two years later, a new protagonist (another Marine) is sent back to the abandoned Mars base to investigate a mysterious beacon, leading to a second confrontation with Dr. Betruger (now a demonic entity) and the recovery of the "Artifact." -60% DOOM 3 on GOG.com
The GOG.com version includes both the original base game and the expansion: