Free games like Diatomic
Below are 8 free-to-play Steam games similar to Diatomic, ranked by player overlap and content similarity. No purchase or Steam login required to view the list. Every pick is a full free-to-play title — not a demo, trial, or time-limited giveaway. imho.run's catalogue refreshes daily, so newly free or newly popular titles surface here without manual editing.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Diatomic page.
Ranked picks
- 1
Orbital Gear
Free-to-play alternative to Diatomic — no purchase or trial window. Shares Action and Indie with Diatomic.
Orbital Gear is a fast paced sidescroller shooter where you utilize the gravitation of celestial objects to give you momentum through space. Arm your Mech with two of the twelve different weapons and destroy your enemies.
- 2
STRAFTAT
Free-to-play alternative to Diatomic — no purchase or trial window. Shares Action with Diatomic.
STRAFTAT is a 1v1/2v2 ONLINE first person SHOOTER with quick rounds in over 350 MAPS ; Including all WEAPONS, proximity chat and 4 players FFA.
- 3
Paint Warfare
Free-to-play alternative to Diatomic — no purchase or trial window. Shares Action and Indie with Diatomic.
A fast-paced online arena FPS with jetpacks, hang gliders, fast respawns, 6-minute rounds and instant matches
- 4
PAPERHEAD EP.0
Free-to-play alternative to Diatomic — no purchase or trial window. Shares Action and Indie with Diatomic.
In this cute cardboard world, something went horribly wrong... You wake up in a prison cell. A strange voice calls to you from the depths of dark corridors covered in runic symbols and blood. Reload your trusty shotgun and find out... WHY WOULD CARDBOARD... BLEED?
- 5
Grapples Galore
Free-to-play alternative to Diatomic — no purchase or trial window. Shares Action and Indie with Diatomic.
Grapples Galore is a fast-paced online multiplayer arena shooter with physics-based grappling hook movement, active ragdolls, and thrilling gunplay.
- 6
Redmatch 2
Free-to-play alternative to Diatomic — no purchase or trial window. Shares Action and Indie with Diatomic.
A free fast-paced online multiplayer FPS with grapple hooks where you upgrade your stats with kills!
- 7
Reflex Arena
Free-to-play alternative to Diatomic — no purchase or trial window. Shares Action and Indie with Diatomic.
Reflex is a competitive Arena FPS that combines modern tech with the speed, precision and freedom of a 90s shooter. If you sunk countless hours into the Quake or Unreal series, Reflex will feel like a welcome return of the old school shooter feel.
- 8
Dirty Bomb®
Free-to-play alternative to Diatomic — no purchase or trial window. Shares Action with Diatomic.
Work together or die alone! Fight to restore peace to London or tear it down for profit in the most challenging team based shooter around.