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Idle Mastermind - Villainous lair building & strategy

Experience villainy like never before with unique characters, strategic gameplay, and humor in this engaging simulator.

Idle Mastermind
  • 1.28 Version
  • 3.2 Score
  • 227K+ Downloads
  • In-game purchases License
  • 7+ Content Rating
Download Android APK (69.38 MB)
Old Versions
Idle Mastermind Idle Mastermind Idle Mastermind Idle Mastermind Idle Mastermind Idle Mastermind Idle Mastermind
CONS

Frequent crashes after watching ads leading to lost rewards.

Pay-to-win elements hinder progression for free players.

Slow progression and grinding can become tedious.

Lack of detailed game explanations may frustrate users.

Technical issues like poor interface responsiveness.

Limited content and roadblocks requiring in-game currency or real money.

Difficulty unlocking new characters or upgrades without purchases.

Unrestored progress after reinstalling leads to player frustration.

Have you ever fantasized about being the antagonist? Designing your own secret base? Recruiting minions? Battling superheroes? Crafting wicked schemes? Plundering a city? Or perhaps… aiming for world domination?

No? Really? Of course, you do!

Idle Mastermind, created by the developers of Idle Apocalypse, stands out as the ultimate supervillain simulator of 2020! Step into the shoes of three different supervillains: the tech-savvy yet small Dr. DOS, the crime lord Yara, and the unpredictable LOL. Each one comes with their own malevolent master plan.

Establish a lair to oversee your operations. Assemble an army of nefarious henchmen to carry out your commands. Conduct raids in the city above to gather valuable resources. Unlock fresh research opportunities and skills to enhance your growing, idle empire of crime.

When you're prepared, implement your sinister scheme and unleash the apocalypse!

Play as three distinct villains, each featuring:

+ A unique lair with specialized floors and henchmen.

+ Various strategies, skills, and narratives.

+ Different styles of resource management.

Construct your ideal lair:

+ 30 distinct floors.

+ Floors that produce resources even when you're offline.

+ Unique gameplay elements within special floors.

Recruit a legion of wicked thugs:

+ Over 20 henchmen.

+ Varied classes and abilities.

+ Unique gameplay focused on resource management.

Additionally, it features the humor and absurd banter characteristic of a Grumpy Rhino game, from the creators of Idle Apocalypse.

Fans of simulation and incremental clicker games will find this wickedly entertaining RPG hard to put down.

An Addictive Simulator That Lets You Savor the Villainy Role

Honestly, stepping into the polished boots (or tentacles!) of Idle Mastermind's eccentric villains has been pure delight. What truly hooked me wasn't just the premise of villainy – it was the incredibly satisfying execution. Building my multi-layered subterranean lair felt tangible; strategically placing resource-generating floors (like Yara's Counterfeit Press churning cash offline) and then awakening to those accumulated gains genuinely fuels your evil momentum. The distinct personalities of Dr. DOS, Yara, and LOL aren't just cosmetic – they dictate entirely fresh playstyles. DOS's intricate microchip economy demanded careful optimization, while Yara's mobster vibes leaned into brute-force raids with her goons, and LOL's chaotic energy led to gloriously messy robot rampages. 

Experimenting with different minion setups (Cyborg? Mutant? Ninja? Why not all!) and watching them interact during city raids adds constant charm and strategic depth to what could be a passive experience. Yes, the signature Grumpy Rhino humor shines through – overhearing a henchman complain about the lair cafeteria slop never failed to elicit a chuckle. It masterfully balances idle progression with meaningful active decisions, ensuring you always have a nefarious project to ponder or tweak. My only mild frustration was occasionally hitting resource bottlenecks early with a new villain, but overcoming them via clever floor prioritization or a well-timed raid became part of the addictive cycle. It’s a deep, polished idle RPG that brilliantly captures the fantasy of building a villainous empire from the ground up, brick by wicked brick.

Addressing Some Common Questions:

Q: Is replay value high with three villains? Absolutely. Each villain’s unique resources, minions, skills, and plot events create three genuinely distinct campaigns. Unlocking core upgrades requires playing all three, but it feels worthwhile rather than grindy.

Q: Is it truly idle? Remarkably so. Key resource-generating floors continue production offline. Progress can feel rapid early on with frequent check-ins, scaling to longer-term projects later.

Q: How complex is the resource management? It starts simple but develops satisfying depth. Resources are interconnected (e.g., raid loot fuels research, which unlocks better minions), requiring thoughtful prioritization. The distinct villains add great variety here.

Q: Does the humor feel forced? Not in my experience. The witty dialogue and henchman banter felt organic and genuinely funny, enhancing the villainous atmosphere without becoming distracting.

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Information
  • Version1.28
  • UpdateAug 19, 2025
  • DeveloperGrumpy Rhino Games
  • CategorySimulation
  • Requires AndroidAndroid 4.4+
  • Downloads227K+
  • Package Namecom.grumpyrhinogames.idlemastermind
  • Signatureed042385be86edee96fc36cf06d3ddf2
  • Available on
  • ReportFlag as inappropriate
Old Versions
User Reviews
3.2 2 Reviews
5
4
3
2
1
  • DemonSin Nightmare
    DemonSin Nightmare

    This idle game stands out as the best. The gameplay hooks you right in, with layers of strategy that keep things interesting. The design feels polished, reflecting careful thought. The art and music add to the experience beautifully. Plus, it has a nice touch of humor that keeps the mood light without crossing into silly territory.

  • This Guy
    This Guy

    This game is a riot when it comes to humor. The jokes and gags hit the mark, making you chuckle all the way through. But when it comes to gameplay, it falls flat. The word "idle" in the title says it all. It feels like the game has missed its chance to shine. Picture this: battling typical heroes as a classic villain, poking fun at their absurdity. That could have been a blast. In the end, it's a funny experience but playing it drags on.

Security Status
Clean

It’s extremely likely that this software program is clean.

What does this mean?

We have scanned the file and URLs associated with this software program in more than 50 of the world's leading antivirus services; no possible threat has been detected.

  • Name: Idle Mastermind
  • Package Name: com.grumpyrhinogames.idlemastermind
  • Signature: ed042385be86edee96fc36cf06d3ddf2