Best Building Games Under $20

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

  1. #197% of 540,205 Steam reviews
    Garry's Mod game key cover art

    Garry's Mod

    $9.99 -49%
    $5.00
    green man gaming & 20 stores
    2004
    SandboxModdableMultiplayer
    Steam97%
    Achieve29
    Deckgold
  2. #297% of 13,860 Steam reviews
    Tiny Glade game key cover art

    Tiny Glade

    $14.99 -3%
    $14.48
    gamivo & 7 stores
    2024
    BuildingRelaxingDesign & Illustration
    Steam97%
    Deckplatinum
  3. #396% of 49,501 Steam reviews
    Oxygen Not Included game key cover art

    Oxygen Not Included

    $24.99 -95%
    $1.07
    eneba & 9 stores
    2019
    Colony SimBase BuildingSurvival
    Steam96%
    Achieve51
    Deckplatinum
  4. #497% of 8,886 Steam reviews
    Shapez 2: Factory game key cover art

    Shapez 2: Factory

    $29.99 -55%
    $13.35
    kinguin & 20 stores
    2026
    AutomationManagementBuilding
    Steam97%
    Achieve83
    Deckplatinum
  5. #596% of 24,681 Steam reviews
    Dyson Sphere Program game key cover art

    Dyson Sphere Program

    $19.99 -19%
    $16.12
    g2a & 6 stores
    2021
    AutomationSpaceBase Building
    Steam96%
    Achieve128
    Deckgold
  6. #698% of 2,933 Steam reviews
    Fireworks Mania game key cover art

    Fireworks Mania

    $14.99 -2%
    $14.67
    gamivo & 2 stores
    2020
    SandboxMultiplayerSingleplayer
    Steam98%
    Achieve25
    Deckgold
  7. #797% of 4,171 Steam reviews
    Town to City game key cover art

    Town to City

    $29.99 -47%
    $15.61
    driffle & 24 stores
    2026
    City BuilderBuildingCozy
    Steam97%
    Achieve38
    Deckgold
  8. #896% of 6,540 Steam reviews
    Aviassembly game key cover art

    Aviassembly

    $9.99
    steam & 5 stores
    2025
    BuildingPhysicsSandbox
    Steam96%
    Achieve11
    Deckplatinum
  9. #995% of 28,249 Steam reviews
    Brick Rigs game key cover art

    Brick Rigs

    $19.99 -47%
    $10.41
    driffle & 20 stores
    2023
    SandboxDestructionBuilding
    Steam95%
    Deckgold
  10. #1096% of 10,616 Steam reviews
    Townscaper game key cover art

    Townscaper

    $5.99 -64%
    $2.11
    instant_gaming & 22 stores
    2020
    ExperimentalSandboxRelaxing
    Steam96%
    Deckplatinum
  11. #1195% of 19,111 Steam reviews
    Against the Storm game key cover art

    Against the Storm

    $29.99 -89%
    $3.02
    driffle & 29 stores
    2023
    StrategySimulationCity Builder
    Steam95%
    Achieve80
    Deckplatinum
  12. #1298% of 1,392 Steam reviews
    Zeepkist game key cover art

    Zeepkist

    $19.99 -13%
    $17.32
    eneba & 7 stores
    2021
    RacingSandboxMultiplayer
    Steam98%
    Achieve55
    Deckgold
  13. #1395% of 10,217 Steam reviews
    Islanders game key cover art

    Islanders

    $4.99 -81%
    $0.92
    driffle & 20 stores
    2019
    RelaxingCity BuilderStrategy
    Steam95%
    Achieve38
    Deckplatinum
  14. #1496% of 5,202 Steam reviews
    Two Point Museum game key cover art

    Two Point Museum

    $29.99 -59%
    $12.13
    driffle & 23 stores
    2025
    SimulationCasualBuilding
    Steam96%
    Achieve54
    Deckplatinum
  15. #1596% of 4,525 Steam reviews
    Poly Bridge 2 game key cover art

    Poly Bridge 2

    $14.99 -82%
    $2.55
    instant_gaming & 17 stores
    2020
    BuildingPhysicsPuzzle
    Steam96%
    Achieve22
    Deckplatinum
  16. #1696% of 3,205 Steam reviews
    MineMogul game key cover art

    MineMogul

    $14.99 -3%
    $14.48
    gamivo & 6 stores
    2025
    AutomationBuildingPhysics
    Steam96%
    Deckpending
  17. #1794% of 19,747 Steam reviews
    PC Building Simulator game key cover art

    PC Building Simulator

    $19.99 -37%
    $12.46
    driffle & 23 stores
    2019
    SimulationEducationImmersive Sim
    Steam94%
    Achieve94
    Deckgold
  18. #1895% of 7,389 Steam reviews
    The Gnorp Apologue game key cover art

    The Gnorp Apologue

    $6.99
    steam & 4 stores
    2023
    IncrementalIdlerStrategy
    Steam95%
    Achieve17
    Deckgold
  19. #1995% of 6,550 Steam reviews
    Wingspan game key cover art

    Wingspan

    $19.99 -82%
    $3.46
    kinguin & 21 stores
    2020
    BuildingBoard GameCard Game
    Steam95%
    Achieve64
    Deckplatinum
  20. #2094% of 9,315 Steam reviews
    My Time at Sandrock game key cover art

    My Time at Sandrock

    $39.99 -92%
    $3.02
    driffle & 37 stores
    2023
    Life SimBuildingFarming Sim
    Steam94%
    Achieve60
    Deckplatinum
  21. #2194% of 7,599 Steam reviews
    Cosmoteer: Starship Architect & Commander game key cover art

    Cosmoteer: Starship Architect & Commander

    $19.99 -7%
    $18.49
    gamivo & 6 stores
    2022
    Sci-fiSingleplayerBuilding
    Steam94%
    Deckgold
  22. #2296% of 2,442 Steam reviews
    Megaquarium game key cover art

    Megaquarium

    $24.99 -70%
    $7.40
    GameSeal & 5 stores
    2018
    SimulationCasualBuilding
    Steam96%
    Achieve25
    Deckplatinum
  23. #2397% of 858 Steam reviews
    Islanders: New Shores game key cover art

    Islanders: New Shores

    $9.99 -73%
    $2.68
    driffle & 18 stores
    2025
    CasualStrategyCity Builder
    Steam97%
    Achieve62
    Deckplatinum
  24. #2495% of 3,849 Steam reviews
    Creeper World 4 game key cover art

    Creeper World 4

    $24.99 -30%
    $17.31
    driffle & 12 stores
    2020
    Tower DefenseReal Time TacticsWargame
    Steam95%
    Achieve29
    Deckplatinum
  25. #2596% of 1,464 Steam reviews
    Poly Bridge 3 game key cover art

    Poly Bridge 3

    $19.99 -2%
    $19.44
    gamivo & 6 stores
    2023
    SimulationPuzzleBuilding
    Steam96%
    Achieve28
    Deckplatinum
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