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: The Marine quickly realizes this isn't just a random outbreak; the demons have intentionally lured him back to finish him once and for all.

: 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

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Doom — 64

: The Marine quickly realizes this isn't just a random outbreak; the demons have intentionally lured him back to finish him once and for all.

: 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