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Castle Idler
Main game
By: Soy Boy Games
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By: Soy Boy Games
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castle idler is a short, relaxing incremental tower defense game with no waves. upgrade towers, collect coins, and unlock powerful prestige upgrades to defend your castle.
Mac · Apr 24, 2026
Worldwide · Exact date · Full release · IGDB
PC (Microsoft Windows) · Apr 24, 2026
Worldwide · Exact date · Full release · IGDB
Catalog sources
28 achievements available.
complete level 10.
LockedSteam
complete level 20.
LockedSteam
complete level 30.
LockedSteam
give an enemy 100 burn stacks.
LockedSteam
give an enemy 1000 burn stacks.
LockedSteam
complete the game.
LockedSteam
deal 1000000 damage with one attack.
LockedSteam
delete a tower for the first time.
LockedSteam
prestige for the first time.
LockedSteam
purchase your first upgrade.
LockedSteam
have 100000 gold at one time.
LockedSteam
have 10000000 gold at one time.
LockedSteam
have 1000000 gold at one time.
LockedSteam
unlock the ice tower.
LockedSteam
kill 1000 enemies.
LockedSteam
reach the maximum upgrade level for any tower.
LockedSteam
beat your previous record time in a level for the first time.
LockedSteam
beat a level without a single enemy escaping.
LockedSteam
set attack priority for the first time.
LockedSteam
give an enemy 1000 poison.
LockedSteam
give an enemy 10000 poison.
LockedSteam
give an enemy 100000 poison.
LockedSteam
give an enemy 1000000 poison.
LockedSteam
have 3 different towers on the map at one time.
LockedSteam
unlock the bomb tower.
LockedSteam
unlock the flame tower.
LockedSteam
unlock the slicer tower.
LockedSteam
upgrade a tower for the first time.
LockedSteam
Community notes
