Average Playtime: 3 hours

Idle Monster TD

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Over 1 million players!

Protect the...monsters? As the commander of the United Monsters Alliance, you’ll defend your homeland from menacing machines in Idle Monster TD.

This delightful take on tower defense flips the script, putting you in charge of helpful creepy-crawlies trying to stop robot invaders from pummeling your base. Strategically place allies like Sea Stallion for extra-speedy attacks, or use Firefly for heavier damage. And if things get real dicey, just wipe the map clean with a firestorm spell!

Eradicating bots gives you upgrades to bolster power, speed, and other stats - and the more bots you obliterate, the more monsters you’ll unlock. Idle Monster TD’s menagerie is filled with awesome beasts, like cute water sprites and scorching fire devils. Discovering new creatures is part of the fun.

Like any loyal pal, Idle Monster TD takes care of itself when you’re away. Come back in a few days to claim gold and power up your defenses. Those robots don’t sleep—but neither do your monsters.

  • Unlock 42 unique, powerful elemental monsters. Monsters from each of the 4 elements (Water, Air, Earth, and Fire) have a widely different set of skills to be used in different situations.
  • Strategize by placing up to 10 monsters at a time. Focus on synergizing their elemental skills and passive boosts.
  • Play on 8 different maps, each requiring different strategies.
  • Non-stop, endless gameplay!
  • Discover countless upgrades, research, spells, artifacts, relics, technology, and more to level up with a variety of different resources.
  • Competitive bi-weekly PvP tournaments.
  • Several rewarding mini-games, such as Drone Swarms, Cargo Ships, and Tech Ships.
  • Fantasy RPG-based world and classes.
  • Complete tons of daily missions and achievements.
  • Offline gold earnings reward you while the game is closed!
  • Fun and cute pixel artwork.

Fans of tower defense games will love this idle RPG spin on the genre. Go on an epic never-ending quest, explore a fantastic world, battle robots and monsters, and defeat epic bosses in Idle Monster TD!
Release date
Iron Horse Games
Iron Horse Games, TBiz5270
Age rating
10+ Everyone 10+

System requirements for iOS

iPhone 6s Plus, iPad 7 2, iPod Touch Fifth Gen, iPhone 7, iPad Mini 3 Cellular, iPad Mini 4 Cellular, iPad Mini 5, iPad 7 5, iPhone X S Max, iPad 8 5 6, iPad Mini, iPhone 5s, iPad Third Gen 4G, iPhone SE Second Gen, iPad Pro Fourth Gen Cellular, iPad Fourth Gen 4G, iPad Pro 9.7, iPhone 4S, iPod Touch Seventh Gen, iPad 8 7 8, iPhone 6s, iPad Third Gen, iPad 7 1, iPhone 1 1 Pro, iPad Pro, iPad Fourth Gen, iPad 2 3G, iPhone 5c, iPad 6 1 1, iPhone X, iPad Mini Retina, iPhone 7 Plus, iPhone SE, iPhone 1 1 Pro Max, iPad Mini 4G, iPhone 8, iPad Seventh Gen, iPad Pro Second Gen, iPad Air 2 Cellular, iPad Mini 5 Cellular, iPhone X S, iPad 8 3 4, iPad Air 2, iPad Pro Second Gen Cellular, iPad Air Cellular, iPad 7 4, iPad Mini 3, iPad Pro Cellular, iPad 6 1 2, iPad Air 3, iPhone 5, iPad Pro Fourth Gen, iPad 2 Wifi, iPad Air, iPhone 6 Plus, iPad Mini Retina Cellular, iPad 7 6, iPad Seventh Gen Cellular, iPhone X R, iPhone 1 1, iPad Pro 9.7 Cellular, iPad Air 3 Cellular, iPhone 6, iPad 7 3, iPad 8 1 2, iPhone 8 Plus, iPod Touch Sixth Gen, iPad Mini 4

System requirements for PC

  • 操作系统: Windows 7 and above
  • 处理器: 1Ghz or faster processor
  • 内存: 2 GB RAM
  • 存储空间: 需要 200 MB 可用空间

System requirements for macOS

  • 操作系统: Sierra 10.12+
  • 处理器: 1Ghz or faster processor
  • 内存: 2 GB RAM
  • 存储空间: 需要 200 MB 可用空间
Edit the game info
Last Modified: Jul 24, 2023

Where to buy

App Store
Pass wave 5000.
Have a monster reach Ascension level 5.
Defeat 10,000,000 enemies.
Have a monster reach Ascension level 15.
Defeat 100,000 bosses.
view all achievements
27 items

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