Idle Atomic

Post-apocalyptic idle RPG with crafting and permanent character upgrades

Checkbox Entertainment · Published by Iron Horse Games · Released Jul 15, 2021

Reviews: Mixed; 63% of 515
Recent reviews: Not enough recent
Players: 12; daily peak, Oct 28, 2026
Steam Deck: Verified
Last update on Steam: 4 years ago; Jan 21, 2022
Minimum PC: Integrated; 0.1 GB RAM · 0.1 GB disk; Full requirements

What is Idle Atomic?

A free-to-play, 2D idle RPG set in a post-apocalyptic wasteland where you fight to survive. You battle monsters, salvage resources, and refine materials while unlocking new zones and hunting bounties. You also level companions for bonuses and use essence to strengthen spells.

For you if...

+you like pixel art and resource management

Not for you if...

−you prefer quick progress over lengthy grinding

What players say

63% of 515 reviews are positive

Players praise the upgrade progression, and some appreciate the more active approach to idling. Others say progress requires too much clicking and attention, criticize expensive paid extras, and report crashes and save corruption that can erase progress.

Screenshots and trailer

Idle Atomic system requirements

Minimum: Integrated, 0.1 GB RAM, 0.1 GB of disk space.

As published by the developer.

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Minimum

OS: Microsoft® Windows 7
Processor: 2.33GHz or faster x86-compatible processor, or Intel Atom™ 1.6GHz or faster processor for netbook class devices
Graphics: Integrated
Memory: 128 MB RAM
Storage: 64 MB available space

Does Idle Atomic have co-op or multiplayer?

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

Single-player

Does Idle Atomic run on Steam Deck?

Verified Yes, Verified by Valve: it works on Steam Deck out of the box.

All functionality is accessible with the default controller configuration
Shows Steam Deck controller icons
In-game text is legible on Steam Deck
Default graphics settings perform well on Steam Deck
External controllers are not supported for the primary player

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows
Achievements: 7
Steam features: Family Sharing
Languages: Text only: English.

Does Idle Atomic 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 27, 2026. How to filter AI games on Steam