Doom 3 (v1.3.1) [gog] < 2025 >

The GOG.com version includes both the original base game and the expansion:

: 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]

: 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 The GOG

: You eventually learn that Dr. Betruger has defected to the side of Hell, orchestrating the invasion in exchange for power. Version 1

The core conflict revolves around . Dr. Betruger’s experiments accidentally (and intentionally) open a gateway to Hell . A massive shockwave ripples through the base, instantly transforming most of the UAC staff into mindless zombies and allowing demonic entities to invade the facility. Key Plot Points

: Unlike the "run-and-gun" style of other entries, the DOOM 3 story emphasizes isolation and darkness.

The story of DOOM 3 (v1.3.1) serves as a gritty, horror-focused reboot of the original series. It is set in the year 2145 on the Mars Research Facility owned by the . The Setting and Premise