: After battling through 25 levels of UAC bases and Hell-warped landscapes, the Marine faces the Mother Demon in her lair and destroys her.
: 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. DOOM 64
: To stand a chance against the Mother Demon , the Marine must find the Demon Keys to power up a mysterious artifact known as the Unmaker . : After battling through 25 levels of UAC