Demon Castle Story

4.8
4.39K reviews
10K+
Downloads
Content rating
Everyone 10+
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About this game

A management simulation in which you take an old, run-down castle and turn it into a dastardly demon stronghold! Recruit unique monsters as your minions and vanquish adventurers who dare to enter your realm!

Install gargoyles, ritual altars, and other devilish decor to boost your castle's mystique and attract more monsters your way. Gift them food and other items to help them grow, and garner their support to fend off pesky adventurers.

You can also send your monster minions out to explore nearby dungeons and towns. They'll bring you back items and other loot, and maybe even some new allies!

As you progress, you can also start merging monsters together to make new ones.

And don't forget traps—essential equipment for proper castle defense! Develop a range of traps like sleep-inducing gas and heavy washbowls to thwart any who cross the threshold of your demonic haven! By placing and combining traps in imaginative ways, you can make your fortress of fiendishness virtually impregnable!

Fend off attacks from mighty adventurers and keep your minions sweet to become the biggest and baddest demon overlord of all time!

Search "Kairosoft" to see our other games. https://kairopark.jp
We've got a whole range of free and one-time-purchase games to enjoy, many of which might feel familiar!
This is the Kairosoft 2D pixel art game series.

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Updated on
Jan 19, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

4.8
4.25K reviews
Nostalgia
January 9, 2026
Another interesting twist on classic Kairosoft gameplay! While it can be tricky to get the hang of room layouts and monster levelling, and some traps seem far more useful than others (looking at you, goo trap+punch machine), once things click, you're in for a satisfying time. It's fun seeing all the familiar hero classes flood into your castle looking for trouble.
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David Thomas
December 19, 2025
After playing this all the way through here are some thoughts: This game is fun, but a lot of little things could have been changed to make it way better. Ex. The game gives you TONS of monsters to try and level up with to few resources or to little upgraded stats to try and keep up with the attacking adventurers. Traps are key. Actually 2 traps are really key, arrows and goo. Monsters merge should cost money not monster points. There's plenty more but not enough space. Good but not their best
8 people found this review helpful
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Noctis Cline
January 4, 2026
I already want a sequel with the concepts expanded on. This game carries a mixture of Shin Megami Tensai demon fusion, tower defense, and monster collection that all took me away somewhat? I will agree you can quickly invalidate gameplay with long tunnels but I think there's still a push to play it in the way the game wants that rewards you. Also all the creatures are so good, I'd love more dragons, birds, and foxes in the next one. Big Kariosoft fan, this is my #2 fave game now.
10 people found this review helpful
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What’s new

Now available in English, Traditional Chinese, Simplified Chinese and Korean!