Out now

Idle Monster TD

Developed by Swell Games LLC · Published by Swell Games LLC

CasualFree To PlayIndieStrategy
StatusOut now ReleaseJun 20, 2021 PriceFree to play

At a glance

PlatformsWindows, macOS
ModesSingle-player
PriceFree to play
StatusOut now
Early accessNo
Languages1
Achievements24

Overview

A casual, free to play, indie game by Swell Games LLC, published by Swell Games LLC — single-player.

Steam’s own one-line description: “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.” — developer/publisher text via the Steam store page.

Reception & community

Steam reviewsMostly Positive — 72% positive of 815
Owners (est.)100000 – 200000
Peak players45
Player-voted tags:StrategyTower DefenseIdlerPixel GraphicsFantasyCombat2DCuteResource ManagementTime ManagementCasualClicker

Review sentiment, ownership and peak-concurrent estimates via SteamSpy; tags are player-voted on Steam. Estimates change over time.

Features & modes

Derived from the gameplay modes and feature categories Steam lists for Idle Monster TD.

FeatureSupported
Single-playerYes
MultiplayerNo
Co-opNo
Online co-opNo
PvPNo
Cross-platform multiplayerNo
Full controller supportNo
Partial controller supportNo
Steam Cloud savesNo
Steam AchievementsYes

System requirements (PC)

As published on the Steam store page. Requirements can change between updates.

Minimum

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

Supported languages (1)

English

Idle Monster TD FAQ

Answered from the official Steam listing as of June 2026. Where something hasn't been announced, we say so rather than guess.

What kind of game is Idle Monster TD?

Steam classifies Idle Monster TD as a Casual, Free To Play, Indie, Strategy game, developed by Swell Games LLC. 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.

Is Idle Monster TD free to play?

Yes — Steam lists Idle Monster TD as Free to Play.

Is Idle Monster TD single-player or multiplayer?

Steam lists these modes for Idle Monster TD: Single-player. It lists a single-player mode.

Is Idle Monster TD on PlayStation, Xbox, or Switch?

Our data comes from the Steam (PC) store, which lists Idle Monster TD for Windows, macOS. Console availability isn’t in our Steam-sourced data — check the official site or the console store.

Is Idle Monster TD out yet?

Yes — Steam lists a release date of Jun 20, 2021.

What platforms is Idle Monster TD on?

Idle Monster TD is listed for Windows, macOS on the Steam (PC) store. Console availability isn't covered by Steam's PC store data — check the official channels.

Is Idle Monster TD single-player or multiplayer?

Steam lists these modes: Single-player.

How much does Idle Monster TD cost?

It's free to play, per Steam.

Does Idle Monster TD have achievements?

Yes — Steam lists 24 achievements for Idle Monster TD.

Who made Idle Monster TD?

Idle Monster TD is developed by Swell Games LLC and published by Swell Games LLC.

Where to get Idle Monster TD

We don't sell games or track prices — this links to the official Steam store page.

View on Steam →

Listing details from Valve's public Steam store data · official site. Not affiliated with Valve/Steam, Swell Games LLC.