Free games like Hostile Mars
Below are 8 free-to-play Steam games similar to Hostile 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 Hostile Mars page.
Ranked picks
- 1
Ultimate Custom Night
Free-to-play alternative to Hostile Mars — no purchase or trial window. Shares Action with Hostile Mars.
Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!
- 2
Magic Archery
Free-to-play alternative to Hostile Mars — no purchase or trial window.
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 Hostile 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
Landfall Archives
Free-to-play alternative to Hostile Mars — no purchase or trial window. Shares Action and Strategy with Hostile Mars.
Break into the Landfall Archives to steal and play previously unreleased games, demos, interactive slide shows, and even an unreleased version of Totally Accurate Battle Simulator from 2017!
- 5
SuchArt: Creative Space
Free-to-play alternative to Hostile Mars — no purchase or trial window. Shares Action and Adventure with Hostile 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!
- 6
Aircar
Free-to-play alternative to Hostile Mars — no purchase or trial window.
A simple immersive flying game built for VR. Pilot an aircar through a futuristic cityscape.
- 7
Outpath: First Journey
Free-to-play alternative to Hostile Mars — no purchase or trial window. Shares Adventure with Hostile Mars.
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!
- 8
South Scrimshaw, Part One
Free-to-play alternative to Hostile Mars — no purchase or trial window.
South Scrimshaw is the story of a newborn whale in a vast alien ocean. It is a richly illustrated experimental visual novel, written in the style of a nature documentary.