Free games like Mars Horizon
Below are 8 free-to-play Steam games similar to Mars Horizon, 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 Horizon page.
Ranked picks
- 1
Steam Engine Simulator
Free-to-play alternative to Mars Horizon — no purchase or trial window. Shares Simulation with Mars Horizon.
The Steam Engine Simulator shown on AngeTheGreat's YouTube channel.
- 2
Magic Archery
Free-to-play alternative to Mars Horizon — no purchase or trial window. Shares Indie and Simulation with Mars Horizon.
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
DORONKO WANKO
Free-to-play alternative to Mars Horizon — no purchase or trial window. Shares Simulation with Mars Horizon.
『DORONKO WANKO』 is a DORONKO Action Game. In this game, You can become a cute, innocent Pomeranian, make your master's home messy and dirty. "Will the master be angry with me?" Don't worry. Because you are a sweet doggie.
- 4
Landfall Archives
Free-to-play alternative to Mars Horizon — no purchase or trial window. Shares Strategy and Indie with Mars Horizon.
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 Mars Horizon — no purchase or trial window. Shares Indie and Simulation with Mars Horizon.
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
Lily's Well
Free-to-play alternative to Mars Horizon — no purchase or trial window. Shares Indie with Mars Horizon.
It is a rainy night in the Spring of 2005. Lily is left home alone after her Papa put her to bed. She is awoken by a cry for help outside her window. It is coming from the well. Help Lily gather rope to go down the well and save the poor soul trapped down there.
- 7
South Scrimshaw, Part One
Free-to-play alternative to Mars Horizon — no purchase or trial window. Shares Indie with Mars Horizon.
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.
- 8
The Riftbreaker: Prologue
Free-to-play alternative to Mars Horizon — no purchase or trial window. Shares Strategy and Indie with Mars Horizon.
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.