Free games like INTERSTELLAR PRIME
Below are 8 free-to-play Steam games similar to INTERSTELLAR PRIME, 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 INTERSTELLAR PRIME page.
Ranked picks
- 1
Ultimate Custom Night
Free-to-play alternative to INTERSTELLAR PRIME — no purchase or trial window. Shares Action and Indie with INTERSTELLAR PRIME.
Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!
- 2
NGU IDLE
Free-to-play alternative to INTERSTELLAR PRIME — no purchase or trial window. Shares Indie and Adventure with INTERSTELLAR PRIME.
NGU Idle is a Free To Play Idle game that's full of weird humor, tons of upgrades and hundreds of hours of content! Try out NGU Idle today and experience the joy of Numbers Going Up!
- 3
The Lab
Free-to-play alternative to INTERSTELLAR PRIME — 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
Princess Remedy in a World of Hurt
Free-to-play alternative to INTERSTELLAR PRIME — no purchase or trial window. Shares Action and Indie with INTERSTELLAR PRIME.
Remedy, a recent graduate from the Saturnian healing school, must descend to Hurtland and use her powers to heal everyone from stray ducks to dark lords, and finally cure the ailing Prince Hingst. It's a short, whimsical adventure with plenty of heart(s).
- 5
Epic Battle Fantasy 3
Free-to-play alternative to INTERSTELLAR PRIME — no purchase or trial window. Shares Indie and Adventure with INTERSTELLAR PRIME.
Epic Battle Fantasy 3 is a silly turn-based JRPG, full of useless NPCs, rabid cats, childish humor, unreasonably large weapons, anime boobs, and other nonsense. And it's totally free!
- 6
The Riftbreaker: Prologue
Free-to-play alternative to INTERSTELLAR PRIME — no purchase or trial window. Shares Action and Strategy with INTERSTELLAR PRIME.
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
Trick & Treat
Free-to-play alternative to INTERSTELLAR PRIME — no purchase or trial window. Shares Indie and Adventure with INTERSTELLAR PRIME.
Trick or treating in a vampire's house.Trick & Treat is a light-hearted Halloween adventure. It's about exploring and solving puzzles in a spooky atmosphere. There will be some horror elements, romance, many bad ends and a happy ending of true love.
- 8
The Last Sovereign
Free-to-play alternative to INTERSTELLAR PRIME — no purchase or trial window. Shares Strategy and Indie with INTERSTELLAR PRIME.
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.