Announcement
Patch v109 (October 20)
Bug Fixes: Critical bug fix that was causing enemies to stop spawning.
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Idle Monster TD
Also known as Idle Monster TD, idle monster td, idle-monster-td
An endless Tower Defense game of epic Monsters vs evil War Machines. Unlock and upgrade tons of unique elemental Monsters (Water, Air, Earth, and Fire) to defend your home from an infinite swarm of robots. Strategize the most effective placement of Monsters to synergize their elemental abilities.
Last update
19 May 2026
Players now
27
Latest update
Update history
Browse past updates and patch notes for this game.
7 updates
October 2023
- Update v108 (October 14)- Fixed some unintended exploits. - Fixed bug related to massive exp gains at the extreme late-game. - Performance improvements.
February 2022
- Miscellaneous: Capped framerate on PC to 60 fps to improve performance (Steam/Kong). Added the new mandatory App Tracking Privacy prompt for iOS 14+ devices (iOS). Improved rewarded video ads experience. Bug Fixes: Fixe…Patch notes
April 2021
- New Content: - New achievement for consecutive waves passed. - New leaderboard titles for consecutive waves passed and spell upgrade levels. - Added enemies killed and highest gold drop to the current run metrics menu.…Store
- Challenge Map Rewards / Customizable Leaderboard Displays (Update v1.43)New Content: Challenge Map rewards - earn a new resource by playing this minigame, and spend them on a whole new set of upgrades! Customizable leaderboard icons and titles - show some flair by unlocking new icons and ti…
January 2021
- Challenge Map Minigame! (Update v1.40)All monster upgrades are turned off. All monsters have roughly the same base damage. A new map with two enemy spawn locations. Monster placement, strategy, and timing are key. Fight for the highest position on the new "…
- - 24 Steam Achievements to complete. - Now able to change your in-game display name on the leaderboards. - Improved anti-cheat measures. - Minor bug fixes and UI improvements.Security
Gallery
In-game media
Achievements
Community progression
Top picks from 24 Steam achievements, sorted by player unlock rates.
- RespectedPrestige 1 time.49.1%
- HunterUnlock 10 unique monsters.44.5%
- MercenaryDefeat 10,000 enemies.37.2%
- BeginnerPass wave 100.37.2%
- ParticipantParticipate in 1 PvP Tournament.25.6%
- HookedReach 1 day of in-game play time.23.8%