The Parallel Dimension (DOOM WAD) - Gameplay (w/ commentary)
An episode 2 replacement for Ultimate Doom created by The Parallel Team for the Boom source port, and one of the earliest for Boom. The final version, 1.8, was released in June 1998, but the WAD appeared to be reuploaded sometime in 1999 likely to add the usual WAD authoring template info.
The story takes place after the events on the Jupiter moon base (probably Evilution). UAC, wanting nothing more to do with slipgate technology, gave an order to demolish every base containing slipgate technology. UAC went silent for a while, but the marines were called months later at the UAC's main base, where during the months of silence they were researching to find the origins of the demon beasts, where they found out they came from another dimension called the "Parallel Dimension", where they had started as human civilization just like the humans on Earth, except they were far more aggressive and violent, and had also invented the atomic bomb there. After a nuclear war there, everyone became flesh-eating demons, and the dimension became hell at this point. With a new slipgate to enter the parallel dimension and a fusion-based atomic bomb, a team of 10 highly-trained marines including the protagonist were set to enter the dimension and blow up the lab with the bomb to eliminate the dimension. Doomguy is the last of the marines to enter after a bathroom break and has found out the others have already been killed off by the bomb by the demons, expecting his arrival. Raged again with revenge, he goes off a long way to find the lab containing another fusion bomb and sets it off and rushes back to base, eliminating the rest of the demons that had escaped to Earth and enjoying another victory.
The first two levels are short but the rest of them do take a while to beat.
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