Idle Mastermind

Contains adsIn-app purchases
4.2
3.87K reviews
1L+
Downloads
Content rating
PEGI 7
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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.
Updated on
6 May 2025

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

4.3
3.58K reviews
Darren McCreadie
6 September 2025
I tried this game because I liked their others, but I didn't find this one nearly as fun or engaging, and it has some really unsatisfying game design choices. There is very little to do when you log in, even for an idle. They also lock players out of claiming event rewards if the event ends before you claim them. Absolutely infuriating since you have to spend hard earned currency to get anywhere in them.
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Chris Garner
10 August 2025
It's a fun idle game with a lot going on Paying to removing ads and getting the trio of permanent buffs is my standard practice for Grumpy Rhino games since that's the closest I can get to feeling like I'm getting a full game and supporting the devs. There is still a lingering worry that not purchasing premium currency could eventually lead to progress stalling out. It'd also be nice if removing ads tweaked the UI to remove mention of them, though that's admittedly a small subjective issue.
2 people found this review helpful
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Nep Lyndens
18 July 2025
Excellent idle game, I'm a pretty big fan of the Grumpy Rhino games! Lowered to a 4 star review only because the game seems to be freezing a lot more frequently lately and it can be fixed by restarting the app, but unfortunately any progress made before the freeze tends to reset itself upon re-opening. Otherwise, very fun to check in on- I love catching conversations and I appreciate that the ads are not forced on you and they make it worthwhile to make the choice to watch them.
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What's new

+ Added Evil Eye skins for Big Shot, Maw, Influenza and Bullion.
+ Hax's default trait has been improved.
+ Hocus's Evil Eye skin has had its name and cost changed.
+ Technical updates.
+ More bug fixes.