Rip and Tear to freedom ! ( a DOOM x Monster...
Doomguy, after getting betrayed by Hayden, is sent to a new world, full of...monstergirls and ponies. Whatever he still has his job to do, because men are enslaved by the furry women and they tried it with him. But, one can't enslave The Hellwalker.
(Au where MLP and MQC women have enslaved all the men and treat them like animals. No romance, only bashing and/or killing of Ponies and Monster girls.
Ps. Rated M for DOOM)