Our story begins 10 years after the events of Doom II. Earth governments try to recompose the remnants of civilization after the war with demons. Meanwhile Cabal co. remained latent, waiting for the right moment to be able to take over the old laboratories of the UAC. The goal of Cabal co. is to build its own portal generator, for the sole purpose of not only bringing back all Cabal co. members who fell in combat against Caleb, but also Tchernobog himself.