Best online co-op games

Submarine disaster management for groups who enjoy jobs, shouting, and betrayal.

Local or online physics brawling that gets sillier as people rotate in.

Scrappy physics horror extraction for groups who enjoy panic, betrayal, and bad decisions.

Native lobbies are capped at 6. Larger rooms depend on community mods and can be less stable.

Community lobby-size mods can push past the native cap; treat this as best-effort rather than guaranteed support.

Source: community lobby-size mods

Creature survival chaos that can scale up when hosted properly.

Large groups require a dedicated server; small co-op is simpler.

Underground survival crafting that scales nicely beyond a small squad.

A cooperative walker-talker from House House built around getting lost and communicating with friends.

Planned for August 4, 2026; use as a wishlist/upcoming pick until release.

An effectively endless shared MMO journey with group bosses, raids, skilling, and years of account progression.

Individual activities have practical group caps, but the overall game and clan structure support very large communities.

Lightweight zombie survival with private-server flexibility.

Best for 16+ with a private server and agreed mods/settings.

Simple cooperative puzzles that get funnier as communication breaks down.

Bosses, building, exploration, and long-term chaos for a medium group.

Chill farming co-op that works for short visits or long campaigns.

Physics brawling made for casual group nights.

Deep survival sandbox for patient group storytelling.

Large groups are best on a dedicated server with agreed rules.

Survival crafting with broad group goals and low pressure pacing.

Best for larger groups with a persistent hosted world.

A civilization-scale server game about building society without destroying the planet.

Needs a persistent server and a group willing to coordinate over days.

Voxel survival RPG with a meaningful 16-player ceiling for hosted worlds.

Use a hosted or dedicated server for smooth 16-player sessions.

A shared factory project that gets funnier and more terrifying with each extra engineer.

Large groups work best with a persistent server and clear roles.

Dinosaur survival for groups who want a persistent server project.

16+ is a server-hosting commitment, not a casual lobby.

First-person factory building for a group that enjoys shared megaprojects.

Bigger groups are possible through server setups, but 4-8 is the clean recommendation.

The default large-group sandbox: build, survive, mod, or host a private event.

16+ works best with a Realm or dedicated/community server.