Fighting your own sister while she's half naked and dripping with demon goo, that's the whole pitch really. Eva needs her throne back and the only way is through her family, one succubus at a time. The combat feels like those old flash arcade brawlers, you know the ones where you mash attack and hope the hitbox gods smile on you. Except here when you lose, you don't just see a game over screen. You get a whole scene of Eva getting used by whatever monster beat her. And honestly? The losing animations are better than the winning ones. The artist clearly spent more time on the defeat poses than the actual fighting sprites.
The hell theme is there but it's more of a backdrop. Red rocks, some fire, the usual. What matters is the enemies. Succubi, demons, tentacle things. Each one has a different way of fucking Eva when she goes down. I kept losing on purpose to the third boss just to see what happened. Then I felt weird about it and went back to actually trying. The controls are simple enough, jump and attack, maybe a special move if you build up meter. But the hit detection is sloppy. Sometimes you'll swear you dodged and still get grabbed.
Reminds me of those old Legend of Krystal games but with more action. Less walking around, more punching. The power restoration thing is just an excuse to unlock new abilities, which mostly means new ways to get knocked down. I don't know why I keep playing these games where the goal is to not see the porn. Maybe that's the real hell.