Ranked 61–76 of 76 open world action games with co-op or multiplayer on Steam. Back to the most-played open world action games.
| Game | Modes | Type | Rating | Playing now | Price |
|---|---|---|---|---|---|
| The Infinite Black 2 | Co-op, PvP | Open world adventure | 86% | 5 | $6.99 |
| Home Legacy | Online multiplayer | Open world adventure | 38% | 1 | Free |
| Unbox: Newbie's Adventure | PvP, Local / split-screen | Open world adventure | 83% | — | $19.99 |
| Grand Theft Auto | Online multiplayer, Single-player too | Crime & open world | 84% | 1 | |
| It's Only Money | Co-op, Single-player too | Crime & open world | 81% | — | $24.99 |
| Robber Knight | Co-op, Single-player too | Crime & open world | 67% | 1 | $39.99 |
| Isles of Yore | PvP | Open world adventure | 70% | — | $19.99 |
| A House of Thieves | Co-op, PvP | Crime & open world | 84% | — | $11.99 |
| Live Inc. | Co-op, PvP | Crime & open world | 74% | — | Free |
| Family Business | Co-op, PvP | Crime & open world | 88% | — | $4.99 |
| Galaxy City® | Online multiplayer, Single-player too | Crime & open world | 70% | — | Free |
| Realm of Cubes | Co-op, Local / split-screen | Open world adventure | 64% | — | $3.99 |
| Kidgilantes | Co-op, Local / split-screen | Crime & open world | 89% | — | Free |
| SpyGuys | Co-op, PvP | Crime & open world | 86% | — | $2.99 |
| Su Hack | PvP | Crime & open world | 80% | — | $3.99 |
| In It Together | Co-op, PvP | Crime & open world | 100% | — | $9.99 |
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