IMHO.

Games like Space Simulation Toolkit

If Space Simulation Toolkit is your kind of game, the closest matches are Lunar Odyssey, Meco Rocket Simulator and Kerbal Space Program — picked from the ranked list below. Reviewers single out its atmospheric, challenging and contemplative. Each pick is ranked by what players of this game also play, shared genres and tags, and review-mined similarity — not a generic popularity list.

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About Space Simulation Toolkit: Physics sandbox game that uses a graphics card as a supercomputer. Change the laws of physics, design mechanisms, create A-Life worlds and inhabit them with living beings, experiment with evolution and AI.

2020IndieSimulationFree To PlayEarly Access24.99 USDWindowsby Pavel Kudinov
Space Simulation Toolkit — Steam game cover
Players highlight
Active developer patches improve usabilityEndless creative freedom with custom materialsHyper realistic physics feel satisfyingAtmosphericChallengingContemplative

Players who liked Space Simulation Toolkit also play

Steam players who put hours into Space Simulation Toolkit also tend to own these titles — a signal called collaborative filtering. imho.run cross-references millions of library ownership patterns to surface games whose real audiences overlap, regardless of whether their genre tags match.

  1. Lunar Odyssey

    WHY THIS

    Top pick for Space Simulation Toolkit fans by collaborative filtering across millions of Steam libraries. 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.

    2022SimulationEarly AccessFreeSteam ↗
  2. Meco Rocket Simulator

    WHY THIS

    Second-strongest match for Space Simulation Toolkit fans by collaborative filtering across millions of Steam libraries. Shares Simulation and Early Access with Space Simulation Toolkit.

    Meco Rocket Simulator is a realistic physics game where you play as an underpaid rocket scientist working for Mecodyne to design and test rocket engines without regard for your safety.

    2025SimulationEarly Access39.69 USDDeck PlayableSteam ↗
  3. Kerbal Space Program

    WHY THIS

    Shares an immersive mood with Space Simulation Toolkit.

    Third-strongest match for Space Simulation Toolkit fans by collaborative filtering across millions of Steam libraries. Shares Indie and Simulation with Space Simulation Toolkit.

    In Kerbal Space Program, take charge of the space program for the alien race known as the Kerbals. You have access to an array of parts to assemble fully-functional spacecraft that flies (or doesn’t) based on realistic aerodynamic and orbital physics.

    2015IndieSimulation9.99 USDDeck PlayableSteam ↗
  4. StarbaseSim

    WHY THIS

    Shares an immersive mood with Space Simulation Toolkit.

    Ranked #4 for Space Simulation Toolkit fans by collaborative filtering across millions of Steam libraries. Shares Simulation and Early Access with Space Simulation Toolkit.

    Operate the Starship space launch system and learn how to catch a rocket to understand what it takes to colonize Mars in this ever-evolving simulation of SpaceX Starbase Texas.

    2025SimulationEarly Access16.37 USDSteam ↗
  5. World Climate Lab

    WHY THIS

    Ranked #5 for Space Simulation Toolkit fans by collaborative filtering across millions of Steam libraries. Shares Indie and Simulation with Space Simulation Toolkit.

    World Climate Lab is a real-time planetary climate simulator. Import your own terrain or sculpt a world in the topography editor, then watch a living climate emerge from physics: winds, oceans, cloud bands and ice. Every climate is calculated, not painted.

    IndieSimulationCasualSteam ↗
  6. Celestial Golf

    WHY THIS

    Ranked #6 for Space Simulation Toolkit fans by collaborative filtering across millions of Steam libraries. Shares Indie with Space Simulation Toolkit.

    It’s 2D golf on an astronomical scale. Bite-sized missions will teach you the techniques of real space flight, without having to worry about fuel or crew. Precisely plan orbital trajectories over the moons of Mars, through the rings of Saturn, and boldly go where no golf ball has gone before.

    2026SportsStrategyIndieSteam ↗
  7. Solar System Simulator

    WHY THIS

    Ranked #7 for Space Simulation Toolkit fans by collaborative filtering across millions of Steam libraries. Shares Indie and Simulation with Space Simulation Toolkit.

    Gravity and exploration sandbox

    2024IndieSimulationCasual7.99 USDSteam ↗
  8. Rocket Science

    WHY THIS

    Shares an immersive mood with Space Simulation Toolkit.

    Ranked #8 for Space Simulation Toolkit fans by collaborative filtering across millions of Steam libraries. Shares Simulation and Early Access with Space Simulation Toolkit.

    Take part in a space program. Design spacecrafts and send them off to explore the vast expanses of space. Experience the real scale of the Solar system and the size of its celestial bodies.

    2020StrategySimulationEarly Access19.99 USDSteam ↗

Cheaper alternatives

Games in the same vein priced at least 40% below Space Simulation Toolkit at current Steam store prices.

  1. Terraria

    WHY THIS

    Priced ~60% under Space Simulation Toolkit on Steam right now. Shares Indie with Space Simulation Toolkit.

    Dig, fight, explore, build! Nothing is impossible in this action-packed adventure game. Four Pack also available!

    2011ActionIndieAdventure9.99 USDDeck VerifiedSteam ↗
  2. Garry's Mod

    WHY THIS

    Priced ~80% under Space Simulation Toolkit on Steam right now. Shares Indie and Simulation with Space Simulation Toolkit.

    Garry's Mod is a physics sandbox. There aren't any predefined aims or goals. We give you the tools and leave you to play.

    2006IndieSimulationCasual4.99 USDDeck PlayableSteam ↗
  3. Lethal Company

    WHY THIS

    Priced ~60% under Space Simulation Toolkit on Steam right now. Shares Indie and Early Access with Space Simulation Toolkit.

    A co-op horror about scavenging at abandoned moons to sell scrap to the Company.

    2023ActionIndieAdventure9.99 USDDeck PlayableSteam ↗
  4. People Playground

    WHY THIS

    Priced ~60% under Space Simulation Toolkit on Steam right now. Shares Indie and Simulation with Space Simulation Toolkit.

    Shoot, stab, burn, poison, tear, vaporise, or crush ragdolls in a large open space.

    2019ActionIndieSimulation9.99 USDDeck PlayableSteam ↗
  5. Undertale

    WHY THIS

    Priced ~60% under Space Simulation Toolkit on Steam right now. Shares Indie with Space Simulation Toolkit.

    UNDERTALE! The RPG game where you don't have to destroy anyone.

    2015IndieRPG9.99 USDDeck PlayableSteam ↗
  6. Vampire Survivors

    WHY THIS

    Priced ~80% under Space Simulation Toolkit on Steam right now. Shares Indie with Space Simulation Toolkit.

    Mow down thousands of night creatures and survive until dawn! Vampire Survivors is a gothic horror casual game with rogue-lite elements, where your choices can allow you to quickly snowball against the hundreds of monsters that get thrown at you. Be the bullet hell!

    2022ActionIndieRPG4.99 USDDeck VerifiedSteam ↗
  7. R.E.P.O.

    WHY THIS

    Priced ~72% under Space Simulation Toolkit on Steam right now. Shares Early Access with Space Simulation Toolkit.

    An online co-op horror game with up to 6 players. Locate valuable, fully physics-based objects and handle them with care as you retrieve and extract to satisfy your creator's desires.

    2025ActionEarly Access6.99 USDDeck PlayableSteam ↗
  8. PEAK

    WHY THIS

    Priced ~68% under Space Simulation Toolkit on Steam right now. Shares Indie with Space Simulation Toolkit.

    PEAK is a co-op climbing game where the slightest mistake can spell your doom. Either solo or as a group of lost nature scouts, your only hope of rescue from a mysterious island is to scale the mountain at its center. Do you have what it takes to reach the PEAK?

    2025ActionIndieAdventure7.99 USDDeck VerifiedSteam ↗

Free alternatives

Free-to-play games that recommended players of this title also tend to enjoy.

  1. Helltaker

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie and Free To Play with Space Simulation Toolkit.

    Helltaker is a short game about sharply dressed demon girls.

    2020IndieAdventureFree To PlayFreeDeck PlayableSteam ↗
  2. Ultimate Custom Night

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie and Free To Play with Space Simulation Toolkit.

    Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!

    2018ActionIndieFree To PlayFreeSteam ↗
  3. Bongo Cat

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. 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?

    2025IndieSimulationMassively MultiplayerFreeDeck PlayableSteam ↗
  4. The Murder of Sonic the Hedgehog

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. 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!

    2023IndieSimulationFree To PlayFreeDeck PlayableSteam ↗
  5. Sheepy: A Short Adventure

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. 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.

    2024IndieAdventureFree To PlayFreeDeck PlayableSteam ↗
  6. missed messages.

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. 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.

    2019IndieSimulationFree To PlayFreeDeck PlayableSteam ↗
  7. NGU IDLE

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. 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!

    2019IndieAdventureSimulationFreeDeck PlayableSteam ↗
  8. Awaria

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie and Free To Play with Space Simulation Toolkit.

    Awaria is a short game about working in haunted maintenance tunnels.

    2024ActionIndieFree To PlayFreeDeck PlayableSteam ↗

Frequently asked about Space Simulation Toolkit

Does Space Simulation Toolkit work on Steam Deck?
Space Simulation Toolkit is currently rated Unsupported on Steam Deck. It may not launch or may have significant issues that block normal play.
How much does Space Simulation Toolkit cost?
Space Simulation Toolkit is listed on Steam at 24.99 USD (current store price; Steam sales may reduce this temporarily).
What games are most similar to Space Simulation Toolkit?
Based on Steam play patterns and shared genres/tags, the games most often recommended alongside Space Simulation Toolkit are Lunar Odyssey, Meco Rocket Simulator, Kerbal Space Program.
Who developed Space Simulation Toolkit?
Space Simulation Toolkit was developed by Pavel Kudinov.

imho.run ranks Steam game alternatives using a mix of collaborative filtering (ALS / iALS / EASE / LightGCN), content scoring over genres, categories, Steam tags, developers, and publishers, plus AI-extracted vibes mined from review text. The page above is generated in seed mode anchored on Space Simulation Toolkit.

For library-aware picks tuned to your specific taste, sign in with Steam on the home page.