GRAIN ROT Player Count Evidence

The supplied official update says the team is testing a public lobby browser and improving how friends join a session. Friends-only and invite-only games remain available for groups that want more control. The announcement frames public lobbies as another way to meet people and play together, not as a replacement for private sessions.

The same update says hosts will receive more tools for managing sessions, but the supplied text does not specify the final button path or every lobby rule. That means the broad flow is confirmed while the exact UI steps remain pending. A current in-game screenshot or official help page is needed before documenting a precise click sequence.

Telephone constructs can connect players who are above or below, and the supplied craft guide describes them as useful when paired with the map room. They can help a separated player receive directions without requiring the whole team to regroup immediately. Crates, phones and other constructs also make the physical space part of the communication plan.

Spark can scout ahead, but it is risky to pull an enemy back toward an empty body. Use short, useful callouts: where the elevator is, which room contains the glowing item, whether a fuse was found, and whether extraction is already prepared. The supplied guides support these decisions even when the lobby interface itself is not fully documented.

The verified record fixes the co-op cap at up to 4 players in online co-op, with solo play supported. Lobbies come in three modes — Solo, Private (friends-only) and Public — and players join through Steam's built-in invite system (there is no server browser and no friend code). Solo strategy stays documented: prioritize a safe route, prepare the elevator, use objects and environmental hazards, and avoid greed once the required coins are secured.

In co-op the same principles scale to roles: a loadout carrier, a hauler, an anti-Rot watch and a spotter, with a phone construct linking players split across floors. If a later official update changes the player cap, the current Steam listing and in-game lobby remain the authority for that question.

Four is the recorded co-op cap; the current Steam listing and in-game lobby remain the authority for any later change.

GRAIN ROT supports up to 4 players in online co-op, plus solo play. Lobbies come in three modes: Solo, Private (friends-only) and Public. Players join through Steam's built-in invite system — there is no server browser and no friend code.

Use the answer at the top when you need a quick decision, then read the field notes when the next action affects your run, purchase or account safety. The page keeps the practical game loop separate from platform, community and live-data claims so one confirmed mechanic does not accidentally become proof of something else.

If a future official source fills the missing field, update the marked sentence and keep the source visible. Until then, the pending label is intentional: it tells the player exactly what the supplied research can support and where verification must continue.

For a run question, carry the confirmed mechanic into a small, reversible test: protect the item, prepare the elevator, communicate the route and extract if the evidence stops. For a store or platform question, pause before spending money and return to the official page.