28 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: Physics sandbox (11) · Factory & automation (9) · Building & crafting (7) · Space sandbox (1)
Which of these do we both own? →
| 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, Local / split-screen | 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 |
| Mortal Online 2 | Online multiplayer | Building & crafting | 61% | 440 | $39.99 |
| Hydroneer | Co-op, Local / split-screen | Factory & automation | 87% | 374 | $4.49 |
| Goat Simulator | Online multiplayer, Local / split-screen | Building & crafting | 91% | 71 | $9.99 |
| Stationeers | Co-op, Single-player too | Factory & automation | 85% | 232 | $26.24 |
| Super Bunny Man | Co-op, PvP | Building & crafting | 87% | 131 | $8.99 |
| Trine Enchanted Edition | Co-op, Local / split-screen | Physics sandbox | 96% | 16 | $2.99 |
| Fireworks Mania - An Explosive Simulator | Co-op, Single-player too | Building & crafting | 97% | 34 | $14.99 |
| Totally Reliable Delivery Service | Co-op, Local / split-screen | Physics sandbox | 82% | 8 | $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; updated 2026-09-08. Powered by Steam — not affiliated with or endorsed by Valve Corporation.