Descend into the depths and defend your miner in Cavern Siege – Idle Forge, an idle defense game where progression never stops.
Mine dozens of unique resources, smelt powerful ingots and alloys, and invest them into an ever-expanding upgrade system. Each depth introduces new challenges, stronger enemies, and more efficient ways to grow your forge. Balance attack, defense, and economy as endless waves of enemies attempt to halt your progress. Optimize your build, unlock new depths, and push your limits further with every run.
Features:
Idle defense gameplay with endless enemy waves
Over 70 resources used to craft ingots and alloys
Deep upgrade systems for long-term progression
Multiple depths with increasing difficulty
Offline progress so your forge keeps working
Designed for both casual and long-term players
Whether you enjoy optimizing numbers, unlocking upgrades, or watching your empire grow over time, Cavern Siege – Idle Forge offers a steady sense of progression with no hard stopping point.
Forge deeper. Defend longer. Grow endlessly.
Latest Version
1.3Requires Android
7.0
Category
Free Strategy GameContent Rating
Everyone 10+ · Fantasy Violence
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Flag as inappropriateLast updated on Mar 17, 2026
Minor bug fixes and improvements. Install or update to the newest version to check it out!
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