It about revenge. Plutonia Experiment: The nation leading researchers have done their utmost to close the seven interdimensional gates in hell but a portal remains open. The last gate to hell remains open manned and guarded by a gatekeeper: A powerful huge and old demon who has the power to open dimension ports and control or protect them. Overall Evilution feels like a set of levels like ID own team - something that would be a compliment if it did not have all the reasons at the top right of the page. There are some new amazing visual effects like star clouds cracks in the walls and cut limbs hanging from the ceiling especially in the appropriate name Human Barbecue the spooky atmosphere and enhances the mood of the game Well Doom. The card design on ID has improved when Hell on Earth was made and the Plutonia cards look like this game more than those in the original Doom as a result.