: A direct narrative sequel to the original games, often available for free or at a low cost on the Epic Games Store.
The central story across the franchise, from the 1993 original to Doom Eternal , follows a nameless space marine—often called the —who becomes the last line of defense against the forces of Hell.
: On the moons of Mars, the Union Aerospace Corporation (UAC) has been conducting secret experiments with teleportation technology. In their pursuit of unlimited energy, they accidentally opened a gateway to another dimension: Hell .
: The research facility is quickly overrun by a ferocious demonic invasion. Bases on Phobos and Deimos are transformed into gore-slicked labyrinths, and the staff are either slaughtered or turned into mindless zombies.