Best Space Games Under $20

The 25 highest-rated space games you can get for under $20, ranked by Steam reviews, with the cheapest key across 21 stores.

  1. #198% of 26,814 Steam reviews
    Star Wars: Empire at War game key cover art

    Star Wars: Empire at War

    $19.99 -4%
    $19.03
    g2a & 5 stores
    2006
    StrategyRTSSpace
    Steam98%
    Deckgold
  2. #296% of 84,235 Steam reviews
    Kerbal Space Program game key cover art

    Kerbal Space Program

    $39.99 -82%
    $6.99
    loaded & 40 stores
    2015
    SpaceSimulationSandbox
    Steam96%
    Deckplatinum
  3. #397% of 19,644 Steam reviews
    Universe Sandbox game key cover art

    Universe Sandbox

    $29.99 -59%
    Historic Low $12.13
    driffle & 22 stores
    2008
    SimulationSandboxSpace
    Steam97%
    Deckgold
  4. #496% of 24,681 Steam reviews
    Dyson Sphere Program game key cover art

    Dyson Sphere Program

    $19.99 -19%
    $16.19
    g2a & 6 stores
    2021
    AutomationSpaceBase Building
    Steam96%
    Achieve128
    Deckgold
  5. #595% of 46,933 Steam reviews
    FTL: Faster Than Light game key cover art

    FTL: Faster Than Light

    $9.99 -69%
    $3.04
    driffle & 19 stores
    2012
    RoguelikeSpaceStrategy
    Steam95%
    Achieve51
    Deckplatinum
  6. #697% of 5,927 Steam reviews
    Spaceflight Simulator game key cover art

    Spaceflight Simulator

    $14.99
    steam & 5 stores
    2022
    SandboxSpace SimSpace
    Steam97%
    Deckgold
  7. #795% of 53,028 Steam reviews
    Outer Wilds game key cover art

    Outer Wilds

    $24.99 -66%
    $8.42
    driffle & 31 stores
    2019
    ExplorationSpaceMystery
    Steam95%
    Achieve17
    Deckgold
  8. #895% of 6,182 Steam reviews
    Heat Signature game key cover art

    Heat Signature

    $14.99 -93%
    $0.95
    kinguin & 13 stores
    2017
    SpaceStealthIndie
    Steam95%
    Achieve70
    Deckplatinum
  9. #992% of 381,693 Steam reviews
    Among Us game key cover art

    Among Us

    $4.99 -49%
    $2.52
    gamivo & 21 stores
    2018
    MultiplayerSocial DeductionOnline Co-Op
    Steam92%
    Achieve33
    Deckgold
  10. #1096% of 2,274 Steam reviews
    Heavenly Bodies game key cover art

    Heavenly Bodies

    $19.99 -80%
    $3.88
    driffle & 23 stores
    2021
    PhysicsLocal Co-OpSpace
    Steam96%
    Achieve25
    Deckplatinum
  11. #1194% of 7,599 Steam reviews
    Cosmoteer: Starship Architect & Commander game key cover art

    Cosmoteer: Starship Architect & Commander

    $19.99 -7%
    $18.57
    gamivo & 6 stores
    2022
    Sci-fiSingleplayerBuilding
    Steam94%
    Deckgold
  12. #1296% of 1,289 Steam reviews
    Master of Orion II: Battle at Antares game key cover art

    Master of Orion II: Battle at Antares

    $5.99
    steam
    1996
    Strategy4XTurn-Based
    Steam96%
    Deckgold
  13. #1393% of 23,559 Steam reviews
    Trailmakers game key cover art

    Trailmakers

    $24.99 -92%
    $1.98
    k4g & 33 stores
    2019
    SpaceFamily FriendlyAction
    Steam93%
    Achieve22
    Deckgold
  14. #1499% of 382 Steam reviews
    Sunshine Heavy Industries game key cover art

    Sunshine Heavy Industries

    $14.99
    steam
    2021
    PuzzleSpaceSandbox
    Steam99%
    Achieve6
    Decksilver
  15. #1595% of 2,260 Steam reviews
    Space Pirate Trainer game key cover art

    Space Pirate Trainer

    $14.99 -31%
    $10.34
    kinguin & 8 stores
    2016
    VRActionSpace
    Steam95%
    Achieve10
    Deckplatinum
  16. #1694% of 3,198 Steam reviews
    Void War game key cover art

    Void War

    $19.99
    steam & 5 stores
    2025
    SpaceRoguelitePerma Death
    Steam94%
    Achieve38
    Deckgold
  17. #1794% of 2,433 Steam reviews
    Reassembly game key cover art

    Reassembly

    $14.99 -16%
    $12.53
    driffle & 11 stores
    2015
    BuildingSpaceSandbox
    Steam94%
    Achieve24
    Deckplatinum
  18. #1894% of 3,434 Steam reviews
    The Swapper game key cover art

    The Swapper

    $14.99 -84%
    $2.29
    g2a & 12 stores
    2013
    PuzzleSci-fiAtmospheric
    Steam94%
    Achieve10
    Deckgold
  19. #1991% of 53,963 Steam reviews
    Astroneer game key cover art

    Astroneer

    $29.99 -82%
    $5.19
    driffle & 22 stores
    2019
    MultiplayerOpen World Survival CraftOpen World
    Steam91%
    Achieve56
    Deckgold
  20. #2098% of 378 Steam reviews
    The Final Earth 2 game key cover art

    The Final Earth 2

    $9.99 -54%
    $4.52
    kinguin & 3 stores
    2022
    Colony SimStrategySpace
    Steam98%
    Achieve27
    Deckgold
  21. #2196% of 619 Steam reviews
    WALL-E game key cover art

    WALL-E

    $19.99 -51%
    $9.61
    eneba & 10 stores
    2008
    AdventureRobotsPost-apocalyptic
    Steam96%
    Deckplatinum
  22. #2291% of 22,310 Steam reviews
    Prey game key cover art

    Prey

    $29.99 -88%
    $3.37
    driffle & 25 stores
    2017
    Sci-fiImmersive SimSpace
    Steam91%
    Achieve58
    Deckplatinum
  23. #2397% of 319 Steam reviews
    Chicken Invaders 2: The Next Wave game key cover art

    Chicken Invaders 2: The Next Wave

    $4.99 -68%
    $1.59
    kinguin & 3 stores
    2002
    ActionIndieCasual
    Steam97%
    Achieve4
    Deckplatinum
  24. #2493% of 2,399 Steam reviews
    Rings of Saturn game key cover art

    Rings of Saturn

    $9.99 -89%
    $1.02
    difmark & 10 stores
    2023
    SpaceSci-fiPhysics
    Steam93%
    Achieve90
    Deckplatinum
  25. #2598% of 259 Steam reviews
    Enter the Chronosphere game key cover art

    Enter the Chronosphere

    $19.94 -55%
    $8.93
    kinguin & 18 stores
    2026
    SpaceDifficultSci-fi
    Steam98%
    Achieve10
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