195 sandbox & building games on Steam with co-op or multiplayer, ranked by how many people are playing right now and how well they review.
Narrow it down: Building & crafting (119) · Physics sandbox (45) · Factory & automation (21) · Space sandbox (10)
| Game | Modes | Type | Rating | Playing now | Price |
|---|---|---|---|---|---|
| Garry's Mod | Co-op, PvP | Physics sandbox | 97% | 18,400 | $4.99 |
| Factorio | Co-op, Single-player too | Factory & automation | 97% | 16,426 | $35.00 |
| Satisfactory | Co-op, Single-player too | Factory & automation | 97% | 12,596 | $39.99 |
| Dyson Sphere Program | Co-op, Single-player too | Factory & automation | 98% | 2,703 | $19.99 |
| House Flipper 2 | Co-op, Single-player too | Building & crafting | 85% | 2,543 | $25.99 |
| Teardown | Co-op, PvP | Physics sandbox | 96% | 1,984 | $29.99 |
| Kerbal Space Program | Co-op, Single-player too | Space sandbox | 95% | 1,844 | $39.99 |
| Human Fall Flat | Co-op, PvP | Physics sandbox | 95% | 950 | $19.99 |
| Totally Accurate Battle Simulator | PvP, Single-player too | Physics sandbox | 98% | 1,299 | $6.79 |
| Stormworks: Build and Rescue | Co-op, PvP | Factory & automation | 90% | 1,488 | $24.99 |
| Brick Rigs | PvP, Single-player too | Physics sandbox | 95% | 983 | $13.99 |
| Trove | Co-op, PvP | Building & crafting | 80% | 758 | Free |
| Trailmakers | Co-op, PvP | Physics sandbox | 92% | 903 | $24.99 |
| FOUNDRY | Co-op, Single-player too | Factory & automation | 79% | 925 | $29.99 |
| Oddsparks: An Automation Adventure | Co-op, Single-player too | Factory & automation | 87% | 808 | $29.99 |
| Mindustry | Co-op, PvP | Factory & automation | 96% | 658 | $9.99 |
| Wobbly Life | Co-op, Local / split-screen | Physics sandbox | 97% | 625 | $24.99 |
| Eco | Co-op, Single-player too | Building & crafting | 81% | 692 | $29.99 |
| Totally Accurate Battlegrounds | PvP | Physics sandbox | 88% | 121 | Free |
| Goat Simulator 3 | Co-op, Local / split-screen | Physics sandbox | 98% | 474 | $29.99 |
| OpenTTD | Co-op, PvP | Building & crafting | 96% | 445 | |
| Mortal Online 2 | Online multiplayer | Building & crafting | 61% | 440 | $39.99 |
| Hydroneer | Co-op, Local / split-screen | Factory & automation | 87% | 374 | $4.49 |
| Forts | Co-op, PvP | Physics sandbox | 92% | 379 | $8.99 |
| Goat Simulator | Online multiplayer, Local / split-screen | Building & crafting | 91% | 71 | $9.99 |
| Craft The World | Co-op, Single-player too | Building & crafting | 89% | 303 | $18.99 |
| Construction Simulator | Co-op, Single-player too | Building & crafting | 82% | 310 | $7.49 |
| ContractVille | Co-op, Single-player too | Building & crafting | 82% | 261 | $9.99 |
| Stronghold: Definitive Edition | PvP, Single-player too | Building & crafting | 86% | 236 | $14.99 |
| Anno 1404 - History Edition | Co-op, Single-player too | Building & crafting | 81% | 260 | $14.99 |
| Stationeers | Co-op, Single-player too | Factory & automation | 85% | 232 | $26.24 |
| NEBULOUS: Fleet Command | Co-op, PvP | Space sandbox | 82% | 212 | $29.99 |
| Placid Plastic Duck Simulator | Co-op, Single-player too | Physics sandbox | 98% | 140 | $1.99 |
| Creeper World 4 | Co-op, Single-player too | Building & crafting | 95% | 203 | $24.99 |
| Galactic Civilizations III | Co-op, PvP | Building & crafting | 77% | 161 | $9.89 |
| Creativerse | Co-op, PvP | Building & crafting | 78% | 35 | $24.99 |
| Portal Knights | Co-op, Local / split-screen | Building & crafting | 83% | 76 | $19.99 |
| Software Inc. | Co-op, PvP | Building & crafting | 94% | 148 | $22.99 |
| Super Bunny Man | Co-op, PvP | Building & crafting | 87% | 131 | $8.99 |
| Tropico 5 | Co-op, Single-player too | Building & crafting | 79% | 97 | $6.99 |
| Wurm Online | Co-op, PvP | Building & crafting | 62% | 151 | Free |
| War Planet Online: Global Conquest | Online multiplayer | Building & crafting | 64% | 155 | Free |
| Stronghold HD (2012) | PvP, Single-player too | Building & crafting | 96% | 106 | $5.99 |
| Stronghold 2: Steam Edition | PvP, Single-player too | Building & crafting | 89% | 128 | $14.99 |
| Stonehearth | Co-op, PvP | Building & crafting | 76% | 68 | $19.99 |
| LEGO® Worlds | Co-op, PvP | Building & crafting | 78% | 43 | $29.99 |
| Rail Route | Co-op, Single-player too | Building & crafting | 90% | 107 | $24.99 |
| Astro Colony | Co-op, Single-player too | Factory & automation | 82% | 88 | $14.99 |
| My Free Farm 2 | Co-op, Single-player too | Building & crafting | 60% | 95 | Free |
| War for the Overworld | PvP, Single-player too | Building & crafting | 86% | 59 | $29.99 |
| Per Aspera | Co-op, Single-player too | Factory & automation | 76% | 68 | $7.49 |
| Trine Enchanted Edition | Co-op, Local / split-screen | Physics sandbox | 96% | 16 | $2.99 |
| SpellForce 3 Versus Edition | Co-op, PvP | Building & crafting | 75% | 79 | Free |
| Castle Story | Co-op, PvP | Building & crafting | 64% | 36 | $9.99 |
| Desynced | Co-op, PvP | Factory & automation | 83% | 75 | $29.99 |
| Wizard with a Gun | Co-op, Single-player too | Building & crafting | 82% | 65 | $24.99 |
| Techtonica | Co-op, Single-player too | Factory & automation | 67% | 62 | $29.99 |
| Stronghold: Warlords | Co-op, PvP | Building & crafting | 65% | 49 | $39.99 |
| Shieldwall | PvP, Single-player too | Building & crafting | 87% | 41 | $17.99 |
| My Little Universe | Co-op, Local / split-screen | Building & crafting | 86% | 65 | $14.99 |
Ready Up is a free tool: enter two Steam usernames and it lists the multiplayer games you both own, runs a bracket to pick one, and suggests new co-op games that fit how you both play. Ratings, tags and player counts from Steam and SteamSpy; page updated 2026-09-23. Powered by Steam — not affiliated with or endorsed by Valve Corporation or Microsoft. Ready Up is a Somebody Decide program. How the data works · Legal & privacy · All types · Game Pass