Free games like MARS
Below are 8 free-to-play Steam games similar to MARS, 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 MARS page.
Ranked picks
- 1
Ultimate Custom Night
Free-to-play alternative to MARS — no purchase or trial window.
Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!
- 2
Magic Archery
Free-to-play alternative to MARS — no purchase or trial window. Shares Simulation with MARS.
Train a commoner to become the greatest archer in this short incremental game! Increase your stats, gather wealth from quests, buy upgrades, and infuse your arrows with magic.
- 3
The Lab
Free-to-play alternative to MARS — no purchase or trial window.
Welcome to The Lab, a compilation of Valve’s room-scale VR experiments set in a pocket universe within Aperture Science. Fix a robot, defend a castle, adopt a mechanical dog, and more. Still not sold? It’s free!
- 4
SuchArt: Creative Space
Free-to-play alternative to MARS — no purchase or trial window. Shares Simulation with MARS.
Paint on any surfaces with numerous tools in Creative Space — a free sandbox version of SuchArt: Genius Artist Simulator. Create masterpieces, complete commissions, and decorate your studio in the most advanced artist sim!
- 5
Outpath: First Journey
Free-to-play alternative to MARS — no purchase or trial window.
Outpath: First Journey is a prologue chapter of the main game, Outpath. An experimental clicker base building game. Craft, gather & manage resources, build your base and buy more islands to exploit and expand!
- 6
The Riftbreaker: Prologue
Free-to-play alternative to MARS — no purchase or trial window. Shares Strategy with MARS.
The Riftbreaker: Prologue allows you to experience the events taking place before the story campaign of the main game. Explore an entirely new world. Gather resources. Build up a base. Defend yourself from thousands of alien creatures.
- 7
The Last Sovereign
Free-to-play alternative to MARS — no purchase or trial window. Shares Strategy with MARS.
Explore a world torn between armies of lust and purity in which everything is more complex than it seems, deciding the fate of nations through might, politics, and finance. Every decision matters in an intricate saga that tracks thousands of variables.
- 8
Dota 2
Free-to-play alternative to MARS — no purchase or trial window. Shares Strategy with MARS.
Every day, millions of players worldwide enter battle as one of over a hundred Dota heroes. And no matter if it's their 10th hour of play or 1,000th, there's always something new to discover. With regular updates that ensure a constant evolution of gameplay, features, and heroes, Dota 2 has taken on a life of its own.