Free games like Project Martians
Below are 8 free-to-play Steam games similar to Project Martians, 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 Project Martians page.
Ranked picks
- 1
Moonring
Free-to-play alternative to Project Martians — no purchase or trial window. Shares RPG with Project Martians.
A dark-fantasy, turn-based, retro-fusion of classic turn-based RPGs and roguelikes, all presented with a unique neon aesthetic.
- 2
Wires And Whiskers
Free-to-play alternative to Project Martians — no purchase or trial window. Shares Action and Indie with Project Martians.
Wires and Whiskers is a local co-op action-puzzle game where two players control a lab-engineered gerbil and its magnetic exosuit. Work together to fight mutated enemies, solve magnetic puzzles, and survive in a ruined, post-apocalyptic trench world.
- 3
SCP – Containment Breach
Free-to-play alternative to Project Martians — no purchase or trial window. Shares Action and Indie with Project Martians.
A procedural first-person horror adventure. You are on your own after something goes terribly wrong in this top-secret containment facility. Collect items to aid in your escape and try to uncover the truth, as horror lurks behind every door. Can you make it out alive?
- 4
Muck
Free-to-play alternative to Project Martians — no purchase or trial window. Shares Action and Indie with Project Martians.
Muck is a survival-roguelike. Collect resources, find items & build a base to survive for as long as you can.
- 5
Where Winds Meet
Free-to-play alternative to Project Martians — no purchase or trial window. Shares Action and Adventure with Project Martians.
Step into an open-world action-adventure RPG set in ancient China. Uncover the secrets of your own identity as you rise from a humble village wanderer to the sword master of the imperial capital. Learn martial arts and build your reputation as a hero or a bringer of chaos in this free wuxia world.
- 6
Limbus Company
Free-to-play alternative to Project Martians — no purchase or trial window.
As the Executive Manager of Limbus Company, lead your group of twelve Sinners, venture into the buried facilities of Lobotomy Corporation, and lay claim on the Golden Boughs.
- 7
Fallout Shelter
Free-to-play alternative to Project Martians — no purchase or trial window. Shares RPG with Project Martians.
Fallout Shelter puts you in control of a state-of-the-art underground Vault from Vault-Tec. Build the perfect Vault, keep your Dwellers happy, and protect them from the dangers of the Wasteland.
- 8
Minion Masters
Free-to-play alternative to Project Martians — no purchase or trial window. Shares Action and Strategy with Project Martians.
An addictive fast-paced hybrid of Card games & Tower-Defense. Play 1v1 - or bring a friend for 2v2 - and engage in epic online multiplayer battles full of innovative strategy and awesome plays! Collect 200+ cards with unique mechanics, all free!