Idle Minertia: Mine & Forge

Contains adsIn-app purchases
66 reviews
Content rating
Everyone
5K+
Downloads
Content rating
Everyone
In-Game Purchases
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About this game

Idle Gem is a fresh idle mining game where every prestige run delivers a unique roguelite experience.
Over 30 updates and 25+ new contents added in the last 6 months. Idle Gem keeps evolving!

■ Idle Mining Game with Auto Progression!
Mining continues automatically even while you're AFK.
Collect gear and materials as you dig deeper. The deeper you go, the stronger the loot — feel the satisfaction of digging further than yesterday!

■ Merge & Upgrade Your Gear!
Fuse and enhance collected equipment to power up instantly.
Boost your mining speed and battle strength. Watch your progress grow in real time.

■ Intense Wave Battles!
Challenge yourself in wave-based RPG combat. How far can you push?
Your gear builds and upgrade choices determine victory. Beating your max wave record feels incredible!

■ Prestige & Endless Growth!
Use the prestige system to restart with carryover bonuses.
Each loop gets smoother and more efficient — a fresh roguelite adventure every time.

■ Frequent Content Updates!
30+ updates and 25+ new features in just 6 months.
Idle Gem is an ever-evolving idle clicker adventure.
Mine, upgrade, and grow
Updated on
Aug 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.
  • This app may share these data types with third parties
    Personal info and App activity
  • This app may collect these data types
    Location, Personal info and 3 others
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

64 reviews
Earl White
February 13, 2026
a simple idle game that makes my phone run much more warm than it should. So, presumably, it still needs optimization. ads will try to fly under your fingers while you play.
2 people found this review helpful
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Isaac Ellingson
October 15, 2025
after tapping to start mining, a graphical glitch occurs where the entire screen flashes blue in an upsetting fashion. the game is unplayable
1 person found this review helpful
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Jaimie Mills
November 28, 2025
it's a bit slow but not a bad game
3 people found this review helpful
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What’s new

- Updated features currently in testing
- Fixed an issue where Apple Sign-In was not restored on startup
- Added an upgrade that shortens the Prestige cooldown
Content rating
Everyone
In-Game Purchases
Learn more

App support

Phone number
+819063984744
About the developer
IDLE SYSTEM K.K.
idle.system.company@gmail.com
6-21, KOGANEMACHI GIFU STATION BLDG. 304 GIFU, 岐阜県 500-8842 Japan
+81 90-6398-4744

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