Idle Mastermind

Contains adsIn-app purchases
4.09K reviews
Content rating
Everyone 10+
100K+
Downloads
Content rating
Everyone 10+
Fantasy Violence, Mild Blood, Alcohol Reference, Mild Language
In-Game Purchases
Learn more
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About this game

Ever wanted to be the villain? To build a lair? Hire henchmen? Fight superheroes? Concoct dastardly plans? Raid a city? Or… take over the world?

No? What, really? Sure you do!

Idle Mastermind, from the makers of Idle Apocalypse, is the best supervillain simulator of 2020! Play as three supervillains. The techy but tiny: Dr DOS. The gangster crime boss: Yara. Or the unpredictable: LOL. Each has their own evil grand plan.

Build a lair to run your empire from. Hire a bunch of evil henchmen to do your bidding. Raid the city above to gain precious resources. Unlock new research and skills to improve your criminal, idle empire.

When you’re ready, execute your evil plan and bring about the apocalypse!

Play as 3 distinct villains, each with:
+ A unique lair with special floors and henchmen.
+ Different strategies, skills and stories.
+ Unique resource management styles.

Build your dream lair:
+ 30 unique floors.
+ Floors that will generate resources while offline.
+ Special floors with unique gameplay elements.

Hire an army of evil thugs:
+ 20+ henchmen.
+ Different classes, abilities.
+ Unique resource management gameplay.

On top of that it has all the humour and inane chatter of a Grumpy Rhino game. The makers of Idle Apocalypse.

Lovers of simulation games and incremental clickers won’t be able to put down this dastardly, near criminal RPG.
Ever wanted to be the villain? Build a lair? Hire henchmen? Take over the world?
Updated on
Sep 11, 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
  • This app may collect these data types
    Location, Personal info and 4 others
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

3.79K reviews
Ruby Fox
March 30, 2022
A fun, creative, and well thought out game. The mechanics are clever, the conversations you can eavesdrop on are always a joy to read, the characters' designs are wonderful, and the music is stellar. I adore the pixel art choice, and I love the jokes. This game takes itself the right amount of seriously, by that I mean it does everything incredibly well while making this game playful and a joy to have. I appreciate, though it may take a while, the option to unlock characters by working hard.
49 people found this review helpful
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poetry hole
September 17, 2021
I've been playing this game for a long while, I've almost beat it. The pacing is almost perfect, if you save all of your green Crystals, you well get your next villain exactly when you need them, the dialogue is witty and surprisingly the main way you learn about different characters. I would recommend this to anyone. My only problem is that getting into evil eye is a bit annoying, but manageable.
64 people found this review helpful
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Nebula Dusk
October 4, 2022
Pretty fun game, much like all the others made by this dev team. Always liked the little events and such, and how removing ads removes them completely. Especially happy about the cooldown on events as opposed to the replay tokens in idle apocalypse. And you can potentially play to completion without spending anything, because the login rewards are pretty good. Takes a long time to beat even with money, so you get plenty out of the game.
41 people found this review helpful
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What’s new

+ Large technical update.
Content rating
Everyone 10+
Fantasy Violence, Mild Blood, Alcohol Reference, Mild Language
In-Game Purchases
Learn more

App support

About the developer
GRUMPY RHINO GAMES LIMITED
support@grumpyrhino.com
Unit 405 Exmouth House, 3-11 Pine Street LONDON EC1R 0JH United Kingdom
+44 20 7953 2233

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