

In *TNT: Evilution*, the Union Aerospace Corporation continues its relentless pursuit of dimensional gateway technology. They establish a research base on Io, one of Jupiter’s moons, and station a strong contingent of space marines to guard the facility. The marines prove effective when the first experimental gateway is activated, as they obliterate every demonic force that emerges. With the immediate threat eliminated, the UAC proceeds with further experiments. Later, the annual supply ship arrives earlier than scheduled and appears oddly massive on radar. Curious, the base personnel investigate and are met with a horrifying sight: a monstrous Hellcraft constructed from steel, stone, flesh, bone, and corruption. The ship’s massive gates open, unleashing a horde of demons upon the base. In moments, the entire facility is overwhelmed, and all personnel are either killed or turned into zombies. The Doomguy, now in charge of the marines, had been on a brief walk and thus avoided the fate of his comrades. After fending off an imp, he returns to the base and witnesses the demonic ship still hovering overhead. Realizing the horror that has unfolded, he vows revenge for his fallen troops and embarks on a brutal mission to destroy every evil creature in his path. In the final confrontation, the Doomguy slays the Demon-Spitter, and the game reveals that something begins to rumble in the distance. A blue light flickers within the shattered skull of the fallen monster.