PCGame

Idle Monster TD

Idle tower defense with monster teams against robot waves

Swell Games LLC · Released Jun 20, 2021

CasualFree To PlayIndieStrategy

Reviews
Mostly Positive
73% of 931
Recent reviews
Not enough recent
Players
22
daily peak, Nov 7, 2026
Steam Deck
Playable
Last update on Steam
3 years ago
Oct 20, 2023
Minimum PC
2 GB RAM · 0.2 GB disk
Full requirements

What is Idle Monster TD?

In this pixel-art fantasy idle tower defense game, you protect a monster homeland from invading robots. You place elemental defenders, cast spells, and buy upgrades across eight maps. You unlock more monsters as you progress and earn gold while the game is closed.

For you if...

  • +you like planning upgrades while progress accumulates passively
  • +you enjoy testing combinations of monsters and their abilities

Not for you if...

  • −you want tower defense that requires constant hands-on play
  • −you prefer a short campaign with a defined ending

What players say

73% of 931 reviews are positive

Players praise the variety of monsters and the strategy involved in combining their abilities. They complain about lost or rolled-back progress, and some say purchases affect competitive play.

Players over time

▲ +1% vs a month ago

Players online on Steam, one sample a day.

Highest since Sep 2026: 30 players on Sep 27, 2026.

Show the data
DayPlayers
Nov 7, 202622
Nov 6, 202618
Nov 5, 202623
Nov 4, 202626
Nov 3, 202620
Nov 2, 202619
Nov 1, 202613
Oct 31, 202616
Oct 30, 202613
Oct 29, 202617
Oct 28, 202624
Oct 27, 202618
Oct 26, 202621
Oct 25, 202624
Oct 24, 202625
Oct 23, 202617
Oct 22, 202625
Oct 21, 202619
Oct 20, 202622
Oct 18, 202618
Oct 17, 202627
Oct 16, 202619
Oct 15, 202623
Oct 14, 202628
Oct 13, 202621
Oct 11, 202621
Oct 10, 202619
Oct 9, 202618
Oct 8, 202618
Oct 7, 202621
Oct 6, 202618
Oct 4, 202619
Oct 3, 202621
Oct 2, 202623
Oct 1, 202619
Sep 30, 202616
Sep 29, 202613
Sep 27, 202630
Sep 26, 202617
Sep 25, 202617
Sep 24, 202626
Sep 23, 202620
Sep 23, 202620
Sep 22, 202621
Sep 21, 202618

Screenshots and trailer

Idle Monster TD screenshot 1

Idle Monster TD system requirements

Minimum: 2 GB RAM, 0.2 GB of disk space.

As published by the developer.

Can my PC run Idle Monster TD?

The published requirements do not name a graphics card we can compare.

Set up my PC →

Minimum

OS
Windows 7 and above
Processor
1Ghz or faster processor
Memory
2 GB RAM
Storage
200 MB available space

Does Idle Monster TD have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Does Idle Monster TD run on Steam Deck?

Playable Playable: it runs on Steam Deck with some adjustments.

  • Some text entry requires manually opening the on-screen keyboard
  • Display output has nonblocking issues
  • Native resolution not supported
  • All functionality is accessible with the default controller configuration
  • In-game text is legible on Steam Deck
  • Default graphics settings perform well on Steam Deck

PC version details

DRM
None declared on Steam
Controller
Keyboard and mouse
Platforms
Windows, macOS
Achievements
24
Steam features
Family Sharing, In-app purchases
Languages
Text only: English.

Does Idle Monster TD use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 25, 2026. How to filter AI games on Steam

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