Cavern Siege - Idle Forge

Descend into the depths and defend your miner in Cavern Siege - Idle Forge, an idle defense game built for endless progression, long-term growth, and strategic build optimization. Mine valuable resources, smelt powerful ingots and alloys, and invest them into a massive upgrade system that keeps expanding as you push deeper. Every depth brings tougher enemies, stronger progression, and new ways to grow your forge. Fight through endless enemy rounds, survive intense Boss Rounds and Sieges, and keep building a stronger defense with hundreds of upgrades, powerful Relics, and advanced Technology fueled by Tech Fragments. Unlock and conquer 10 open depths, shape your build around offense, defense, and economy, and see how far your forge can grow with no hard stopping point. Compete with other players in Ascension to win great rewards! Climb the leaderboards, and prove that your strategy and builds can outlast the competition. Features: Idle defense gameplay with endless enemy pressure Hundreds of upgrades for long-term progression Over 70 resources used to craft ingots and alloys Powerful Relics that change how you push each run Technology upgrades powered by Tech Fragments 10 open depths with increasing challenge and reward Boss Rounds and Sieges that test your build Ascension runs and competitive leaderboards Offline progress so your forge keeps working Whether you enjoy optimizing numbers, unlocking systems, chasing long-term goals, or competing for higher ranks, Cavern Siege - Idle Forge offers a steady sense of growth that never stops.