Succubus: Prologue is an experience that, while aiming to shock and titillate, manages to feel like a bloated parody of itself, with gameplay that's as shallow as its grotesque violence is over-the-top.

The game’s primary appeal, according to its developers, seems to be its unrelenting brutality and explicit content, framed in a setting that feels like a cheap attempt to outdo DOOM’s hellish carnage​. The combat, which involves a lot of "flashy executions," tries hard to replicate DOOM Eternal's frantic pace but without the polish. The same handful of weapons and powers are recycled endlessly, and while you can upgrade your gear, the combat quickly becomes repetitive​.

The storyline is laughably underdeveloped, a predictable revenge arc where the titular Succubus, maimed and betrayed, seeks to unleash hell (again). You get bombarded with endless waves of demons in monotonous arenas, and while you can switch between first- and third-person views, neither perspective makes the action more compelling​.

The “shock value” element, with its visceral executions and bizarre healing mechanics (seriously, eating fetuses and ripping genitalia off sinners to regain health?), feels desperate rather than edgy​. It’s as if the game is constantly waving for attention, hoping the excessive violence will distract you from the fact that its core gameplay loop is clunky and uninspired.

Visually, the game offers little relief. Sure, the environments are packed with fire and brimstone, but everything looks cheap and overly processed, with poor texture quality and unimaginative design​. And while the voice acting might occasionally fit the hellish tone, it’s hard to care when the game itself gives you no reason to stay invested.

Ultimately, Succubus: Prologue is a gratuitous mess. The game basks in its own excess but offers little substance beneath the gore. If you’re here for the shock value alone, maybe you’ll last an hour or two, but beyond that, there’s not much to keep you coming back.

It's okay for a demo
Pros:
*It's free. So the issues are forgivable when they show up.
*Two levels to chose from in the prologue. One is an exploration level and the other is an arena
*Three types of weapons with three different variations for each weapon: base and ones you can buy at the weapons store. This also goes for the armor.
*Graphics look amazing.
*MadMan Studio's vision of hell looks delightfully hellish and horrifying just like the original game, Agony.
*Environment is very interactable. You can kill the madmen sitting around you and slice apart hanging corpses. It's addicting.
*You heal by killing enemies and inflicting pain on helpless sinners. I can barely watch the part where you pull the baby out of the mother. And I have to look away when the succubus rips the male's ♥♥♥♥ off. I'm serious. That happens.
*Scenes of your succubus character just chilling out in her cave to bathing in a bath full of blood looks good. Not really for me, but most likely great for other people.
*After the demo, you can continue playing via ranked mode. This is a lot better than other demos where the fun just comes to a dead halt.
*Added a censor setting where all the nudity is censored. Good for YouTube or if you want to keep your lunch in you.

Cons:
*This game crashed on me at least more than 4 times, so be warned.
*One time, I got stuck in some micro corner of the level in which I couldn't move or get out. Had to restart the level.
*This may have just been me, but you'll have to do some grinding if you want to win the arena level. I was close to dying before my game crashed, so I went to the first level a lot of times to get souls for better weapons and armor.
*If there's a lot of enemies, you'll find that the FPS goes down.
*The FPS goes down if you put the graphics on Ultra. Probably just my computer's issue though.
*There's nearby enemies that fly around your cave and no matter how many times you kill them, they always come back. Leave them alone and you'll be stuck hearing their sounds. Pretty annoying.

Overall, it's okay. If you can handle the game crashing a couple times, the game is DOOM inspired ripping and tearing inspired by DOOM (your black mist friend actually references a BFG) set in the world of Agony. It's a blast slaughtering sinners en mass, even if I had to look away at times when it came to the "medic packs". It's satisfying to constantly do finisher after finisher on your countless foes or just kick them into spikes. Just be away that the game can crash at random, so be warned. I hope they fixed that for the full release.
Still, an enjoyable experience nonetheless.