73%Strong matchDesktop Raid
76%64176% positive reviews, Mostly Positive across 641 reviews·Idler · Creature Collector
—Command your heroes, build unstoppable formations, and hold the line against endless waves. Recruit 40 unique heroes, grow stronger even while offline. Turn your castle into an unbreakable fortress.
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Endless Castle: Under Siege
SteamAbout Endless Castle: Under Siege
Game Description
Deeply blending the classic elements of idle and tower defense games, this game offers rich hero and equipment build options. Hands-free and hassle-free, enjoy the joy of strategic combination and effortless growth!
Please Note
This game contains extensive equipment grinding elements. Players who do not enjoy grinding for gear are advised to purchase with caution!!!
Game Features
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Auto Battle Fully hands-free with auto-battle mode — level up and hunt for loot at the same time.
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Numerous Heroes 40 unique heroes allow you to build diverse lineups and explore various playstyles.
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Hero Equipment Random combinations of dozens of ability affixes make every drop and forge a moment of anticipation!
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Varied Modes Beyond idling, enhance your overall strength through colonies, dragon battles, expeditions, fortresses, and other distinct gameplay modes.
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Stress-Free No penalties for defeat — simply wait for your power to grow and try again. No enemy is unbeatable!
Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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