Free games like Space Simulation Toolkit
Below are 9 free-to-play Steam games similar to Space Simulation Toolkit, 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 Space Simulation Toolkit page.
Ranked picks
- 1
Helltaker
Free-to-play alternative to Space Simulation Toolkit — no purchase or trial window. Shares Indie and Free To Play with Space Simulation Toolkit.
Helltaker is a short game about sharply dressed demon girls.
- 2
Ultimate Custom Night
Free-to-play alternative to Space Simulation Toolkit — no purchase or trial window. Shares Indie and Free To Play with Space Simulation Toolkit.
Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!
- 3
Bongo Cat
Free-to-play alternative to Space Simulation Toolkit — no purchase or trial window. Shares Indie and Simulation with Space Simulation Toolkit.
Bongo cat needs your help. Bongo cat needz more hatz!!! Every time you press a key, Bongo cat will punch your taskbar. Type, click, play, work to collect more points. Which hats will you find?
- 4
The Murder of Sonic the Hedgehog
Free-to-play alternative to Space Simulation Toolkit — no purchase or trial window. Shares Indie and Simulation with Space Simulation Toolkit.
Sonic the Hedgehog...was murdered!? Get to the bottom of the mystery in this brand-new adventure!
- 5
Sheepy: A Short Adventure
Free-to-play alternative to Space Simulation Toolkit — no purchase or trial window. Shares Indie and Free To Play with Space Simulation Toolkit.
A Short Handcrafted Pixel Art Platformer that follows Sheepy, an abandoned plushy brought to life. Sheepy: A Short Adventure is the first short game from MrSuicideSheep.
- 6
missed messages.
Free-to-play alternative to Space Simulation Toolkit — no purchase or trial window. Shares Indie and Simulation with Space Simulation Toolkit.
‘goth gf’s iPhone’ airdrops you - accept or decline? A love/horror story about life, death, & memes.
- 7
NGU IDLE
Free-to-play alternative to Space Simulation Toolkit — no purchase or trial window. Shares Indie and Simulation with Space Simulation Toolkit.
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!
- 8
Awaria
Free-to-play alternative to Space Simulation Toolkit — no purchase or trial window. Shares Indie and Free To Play with Space Simulation Toolkit.
Awaria is a short game about working in haunted maintenance tunnels.
- 9
Lunar Odyssey
Free-to-play alternative to Space Simulation Toolkit — no purchase or trial window. Shares Simulation and Early Access with Space Simulation Toolkit.
Don your xEMU Spacesuit, explore the Orontius Crater, and Lunar Module in an immersive first-person VR experience with out of this world accuracy and interaction. Follow real-life procedures, launch the Apollo-era Lunar Module, play Space Golf, and experience the moon like never before.