: After battling through 25 levels of UAC bases and Hell-warped landscapes, the Marine faces the Mother Demon in her lair and destroys her.
A lone satellite orbiting the planetoid (beyond Neptune) detected the surge in demonic activity. As the only experienced survivor of the original invasions, the Marine is re-commissioned and sent in alone for one last extermination mission. Key Story Beats DOOM 64
: Realizing that Hell will never stop as long as he is alive on Earth, the Marine makes a fateful choice. He decides to stay in Hell forever to ensure no demon ever rises again, beginning his path of perpetual torment. : After battling through 25 levels of UAC