281 mmo games on Steam with co-op or multiplayer, ranked by how many people are playing right now and how well they review. Part of RPG.
MMOs are the longest commitment on this list and the best one when both of you stick with it. Final Fantasy XIV is the consensus pick for two friends — a story you can share and a duty finder that pairs you with others when you need them. The Elder Scrolls Online and Black Desert are the big open worlds, Lost Ark and Albion Online the grind-and-raid options, Fallout 76 the one that quietly became good. Player counts matter enormously here and the ranking leans on them: an MMO with a busy world is a different game from the same MMO half-empty.
| Game | Modes | Type | Rating | Playing now | Price |
|---|---|---|---|---|---|
| FINAL FANTASY XIV Online | Co-op, PvP | MMO | 88% | 19,824 | $19.99 |
| Lost Ark | Co-op, PvP | MMO | 71% | 17,355 | Free |
| The Elder Scrolls® Online | Co-op, PvP | MMO | 81% | 15,987 | $19.99 |
| Black Desert | Co-op, PvP | MMO | 74% | 14,345 | $9.99 |
| IdleOn - The Incremental MMO | Co-op, Single-player too | MMO | 80% | 11,081 | Free |
| Fallout 76 | Co-op, PvP | MMO | 73% | 8,796 | $39.99 |
| Albion Online | PvP | MMO | 79% | 8,184 | Free |
| MapleStory | Co-op, Single-player too | MMO | 63% | 8,092 | Free |
| New World: Aeternum | Co-op, PvP | MMO | 69% | 5,583 | |
| STAR WARS™: The Old Republic™ | Co-op, PvP | MMO | 90% | 6,625 | Free |
| EVE Online | Co-op, PvP | MMO | 74% | 3,705 | Free |
| Guild Wars 2® | Co-op, PvP | MMO | 89% | 3,277 | Free |
| RuneScape ® | Online multiplayer | MMO | 83% | 2,496 | Free |
| Realm of the Mad God Exalt | Co-op | MMO | 83% | 1,853 | Free |
| Shakes and Fidget | Online multiplayer, Single-player too | MMO | 92% | 1,389 | Free |
| Phantasy Star Online 2 New Genesis | Co-op | MMO | 70% | 1,400 | Free |
| Knight Online | Online multiplayer, Single-player too | MMO | 50% | 1,421 | Free |
| Transformice | Online multiplayer | MMO | 88% | 1,284 | Free |
| Granado Espada | PvP | MMO | 64% | 1,313 | Free |
| Star Trek Online | Co-op | MMO | 79% | 1,057 | Free |
| Old School RuneScape | Online multiplayer | MMO | 83% | 1,050 | Free |
| Pantheon: Rise of the Fallen | Co-op, PvP | MMO | 76% | 876 | $39.99 |
| The Lord of the Rings Online™ | Co-op, PvP | MMO | 81% | 793 | Free |
| Neverwinter | Co-op, PvP | MMO | 78% | 665 | Free |
| The Quinfall | Co-op, PvP | MMO | 48% | 669 | $0.99 |
| DC Universe™ Online | Co-op, PvP | MMO | 81% | 546 | Free |
| Mabinogi | Co-op, Single-player too | MMO | 74% | 559 | Free |
| EverQuest | Online multiplayer | MMO | 81% | 456 | Free |
| Elsword | Co-op, PvP | MMO | 74% | 401 | Free |
| Karos | Co-op, PvP | MMO | 66% | 441 | Free |
| Bless Unleashed | Online multiplayer | MMO | 53% | 291 | Free |
| Tower of Fantasy | Co-op, PvP | MMO | 69% | 354 | Free |
| Tower Unite | Co-op, PvP | MMO | 90% | 282 | $19.99 |
| Dungeons & Dragons Online® | Co-op, PvP | MMO | 71% | 260 | Free |
| Digimon Masters Online | Co-op, PvP | MMO | 67% | 236 | Free |
| Tree of Savior (English Ver.) | Online multiplayer | MMO | 64% | 163 | Free |
| Bit Heroes Quest | Co-op, Single-player too | MMO | 81% | 236 | Free |
| Spiral Knights | Co-op, Single-player too | MMO | 84% | 132 | Free |
| NosTale - Anime MMORPG | Co-op, PvP | MMO | 71% | 210 | Free |
| DK Online | Co-op, PvP | MMO | 48% | 204 | Free |
| AdventureQuest 3D | Co-op, PvP | MMO | 82% | 160 | Free |
| LoveBeat | PvP | MMO | 75% | 195 | Free |
| RIFT | Co-op, PvP | MMO | 74% | 139 | Free |
| Project: Gorgon | Online multiplayer, Single-player too | MMO | 86% | 181 | $24.99 |
| Vindictus | Co-op, Single-player too | MMO | 67% | 141 | Free |
| Soulworker | Co-op, Single-player too | MMO | 71% | 127 | Free |
| Pax Dei | Co-op, PvP | MMO | 66% | 145 | $29.99 |
| Star Conflict | Co-op | MMO | 73% | 95 | Free |
| Hero Zero - Multiplayer RPG | PvP, Single-player too | MMO | 82% | 143 | Free |
| EverQuest II | Online multiplayer | MMO | 80% | 143 | Free |
| Sword Art Online: Integral Factor | Co-op, Single-player too | MMO | 64% | 135 | Free |
| Warspear Online | PvP | MMO | 73% | 122 | Free |
| Champions Online | Co-op | MMO | 71% | 113 | Free |
| Exile to Death | PvP, Single-player too | MMO | 46% | 125 | $0.74 |
| Animal Jam | PvP | MMO | 66% | 104 | |
| Runes of Magic | Co-op, PvP | MMO | 68% | 100 | Free |
| Ragnarok Online | Online multiplayer, Single-player too | MMO | 72% | 80 | Free |
| Metin2 | PvP | MMO | 70% | — | |
| SoulWorker - Anime Action MMO | Co-op, PvP | MMO | 79% | — | |
| Kakele Online - MMORPG | Co-op, PvP | MMO | 85% | 67 | Free |
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