Idle Mastermind

Name: Idle Mastermind
Rating: 4.6 (433 reviews)
Author: Grumpy Rhino Games LTD

By: Grumpy Rhino Games LTD

Play the super villain!

Features & Capabilities

Idle Mastermind lets you play as three distinct supervillains—Dr DOS, Yara, and LOL—each with their own lair, floors, and evil plan. Build a criminal empire: develop a lair, hire henchmen, and raid the city above to amass resources. Enjoy the humor and banter from Grumpy Rhino as your empire grows (even when you’re away).

Features include 30 unique floors per lair, offline resource generation, and 20+ henchmen classes with different strategies and skills. Unlock research, complete events, collect skins, and join the Evil Eye Association as you pursue world domination. From the makers of Idle Apocalypse, this idle RPG blends strategy with humor for fans of simulation and incremental games.

User Growth & Download Statistics

App Games Entertainment

By:

Grumpy Rhino Games LTD

Rating:

4.60

(433) 2 new ratings

Version:

1.34 Last updated: 2025-11-05

Version code:

879361595

Creation date:

2021-03-30

Compatible devices:

Size:

282.27MB

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-06

Compare stats and ranking:

Ranking

# 83,850 ▲ 91

Other platforms

Idle Mastermind (v1.34)

473,502 4.61

(4,021)

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Grumpy Rhino Games LTD

Apple Apps Store

https://apps.apple.com/us/app/idle-mastermind/id1488900054

Website:

http://www.grumpyrhinogames.com/

User Reviews

Idle Mastermind is praised for its charming art, witty writing, and strong idle/active balance with a rewarding prestige system, plus optional ads and regular updates. However, players repeatedly cite a very slow grind and time-gating, heavy monetization that can block progress, and occasional bugs or crashes that affect playability. Overall, solid presentation and mechanics are marred by pacing and monetization concerns.

Pros

Charming art style with witty humor and colorful pixel graphics.
Strong idle/active gameplay balance with deep base mechanics and a rewarding prestige/reset system.
Progression can be pursued without spending money; ads are optional and monetization can be fair.
Regular events and updates keep the game fresh and varied.
Developers are responsive with ongoing quality-of-life updates.

Cons

Progression is painfully slow due to grind and time-gating, especially for non-payers.
Monetization concerns: high-priced IAPs, paywalls, and events that require purchases to advance.
Endgame feels repetitive or lacks depth, with progression potentially stalling.
Bugs and stability issues like startup crashes and occasional audio glitches.

Recent reviews

I still like it a lot, but the gameplay loop isn’t as satisfying and strategic as Necromerger and Idle Apocalypse. Also the art and things you unlock aren’t as interesting to me since I prefer monster-type characters.

by We*****, 2025-07-01

Like their other game NecroMerger, there’s a lot to like: the pixel graphics are great, there’s a lot of whimsy, and it’s clearly a polished game. But it’s just painfully slow to make any progress. And this game (unlike NecroMerger) has a ‘prestige’ mechanic, so it’s painfully slow… over and over again in the exact same way. I’m not suggesting the game progress 1,000% faster, but maybe 20% faster. Fundamentally both games at their current pace are just boring.