Free games like The Dark Side Of Mars
Below are 8 free-to-play Steam games similar to The Dark Side Of 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 The Dark Side Of Mars page.
Ranked picks
- 1
Doki Doki Literature Club!
Free-to-play alternative to The Dark Side Of Mars — no purchase or trial window.
The Literature Club is full of cute girls! Will you write the way into their heart? This game is not suitable for children or those who are easily disturbed.
- 2
Ultimate Custom Night
Free-to-play alternative to The Dark Side Of Mars — no purchase or trial window.
Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!
- 3
Indigo Park: Chapter 1
Free-to-play alternative to The Dark Side Of Mars — no purchase or trial window. Shares Adventure with The Dark Side Of Mars.
Explore the abandoned childhood wonder of Indigo Park! Guided by Rambley the Raccoon, help restore power to the destroyed amusement park while you run from the reason it shut down.
- 4
Dagon: by H. P. Lovecraft
Free-to-play alternative to The Dark Side Of Mars — no purchase or trial window. Shares Adventure with The Dark Side Of Mars.
Face unspeakable horrors. Succumb to madness. Welcome to a free daemonic narrative experience inspired by H. P. Lovecraft.
- 5
Paper Lily - Chapter 1
Free-to-play alternative to The Dark Side Of Mars — no purchase or trial window. Shares Adventure with The Dark Side Of Mars.
Paper Lily is an RPG horror game in which you can solve puzzles in different ways. Explore a hidden world, meet strange characters, and guide Lacie as she attempts to find answers about her unusual condition.
- 6
The Lab
Free-to-play alternative to The Dark Side Of 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!
- 7
Z.A.T.O. // I Love the World and Everything In It
Free-to-play alternative to The Dark Side Of Mars — no purchase or trial window. Shares Adventure with The Dark Side Of Mars.
USSR, 1986. A girl goes missing in the closed city of Vorkuta-5, yet not a soul seems to be concerned. Uncover the mystery behind her disappearance and transmit your signal to the universe.
- 8
Project Kat - Paper Lily Prologue
Free-to-play alternative to The Dark Side Of Mars — no purchase or trial window. Shares Adventure with The Dark Side Of Mars.
Project Kat is a short, unconventional RPG horror game in which there is always another way. Solve puzzles, make friends (or not), and guide Kat as she attempts to uncover the mystery behind a strange golden letter.