He Who Vowed to Create a Demon Harem

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updated on Apr 15, 2025

In He Who Vowed to Create a Demon Harem, a hero finds himself in an unexpected predicament-falling for the demons he was sent to destroy. Set in 1887, humanity is under siege by demonic invaders, and only the brave warriors known as heroes stand against them. Theo, one such hero, is determined to reclaim the city of Manc from the powerful Halfas family. But things take an unexpected turn when he encounters the family’s daughters, far more captivating than ever imagined.

Thrown together by fate, Theo and three demon girls embark on an epic journey filled with danger, unexpected alliances, and undeniable attraction. Though they start at odds, a mysterious artifact soon helps bridge the gap between them in interesting ways. Will Theo fulfill his mission, or will he succumb to the charms of his former enemies? In this world of magic and temptation, anything is possible.

Developer:Avantgarde

Rating: 5Votes: 53

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REVIEWS (40)

contentsumo - Jul 29, 2025
Does enyone else get stuch on now loading in the hospital after defeat
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contentsumo - Jul 27, 2025
is there unavoidable NTR in this cuz it looks similar to fox girls don't tell lies and I despite that game with a pasion.
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parkchihoo - May 31, 2025
if you leave Mank city by the left and go in the last mass of plant on the bottom of the screen you can glitch out of the area and end at the outside of the barrier
also u cant put on the lewd crest on one of the girls
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Furno - May 05, 2025
i found a bug. if you leave Mank city by the left and go in the last mass of plant on the bottom of the screen you can glitch out of the area and end at the outside of the barrier
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- PayneScott - May 12, 2025
  also u cant put on the lewd crest on one of the girls
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- Admin - May 05, 2025
  Please open your browser console after having the error or freeze. You will find the error text at the end of the log.
  Copy-paste the error here or in the Bug report form. Thank you!
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RanDan - May 02, 2025
I'm thankful for the bug fixes and the developers of this game, I've enjoyed playing and it goes down as one of my favorites...I haven't finished the game yet, so these questions may be answered. One thing I was curious as I progressed is what happened to the children after the births? Does the dad and mom of Rose, Layla, and Mia ever make an appearance? One bug that refuses to go away it seems and has the dreadful, "now loading" screen still happens when the MC loses a battle, I really like that in defeat MC can still "help" his harem learn skills/moves.
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Mesjaka - May 02, 2025
Help I cant export saves, do you have to play all in one go?
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- Ethan - May 08, 2025
  Please help
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  - Admin - May 08, 2025
    The game uses your browser’s cookies to save progress, so your saves might be lost due to:
    • Playing in incognito mode (which doesn’t store cookies).
    • Switching browsers or devices (saves are tied to one browser on one device).
    • The game updating, which can sometimes reset progress.
    • Clearing browser history, which may also delete cookies.
    
    To prevent losing your saves, try playing in a regular browser window, avoid clearing history or cookies, and always use the same browser and device.
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andros - Apr 26, 2025
😍😍😍
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Kon - Apr 24, 2025
Why still pregnant when using condom?
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person - Apr 24, 2025
i played this game for 12 hours and holy shit it was worth it.. this game is really amazing, the ending is really great too.
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- Jax-sad - Apr 28, 2025
  Hold up does it take that long to get the ending?? And after the ending can you still continue playing or no?
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  - person - May 07, 2025
    it doesnt take that long, its just me exploring and 100% ing the game
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    - Jax-sad - May 19, 2025
      Ohhhh, now it make sense thanks for replying
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  - Witra - Apr 29, 2025
    Once you get the ending, you'd stuck in the recollection room. so dont rush to interact with the "!" the second time on the 2nd floor of the castle nor the one near the gate after you finished talking with your peoples
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    - Jax-sad - Apr 30, 2025
      Your people's? Who the humans at the mank city?
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    - Jax-sad - Apr 30, 2025
      Thx for the information, so when you get the the castle again you'll finish the game? Cuz the first time Mr lust lord makes the castle fly which means you'll go there again the second time right? And that's the ending?
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Steve - Apr 20, 2025
Has anyone been able to complete the game?
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