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Multiplayer & How to Invite Friends

How co-op works in GRAIN ROT, how to invite friends through Steam, and why there is no public matchmaking.

Updated August 11, 2026Verified against official sources

Direct answer

Create or join a player-hosted Steam lobby, then invite friends through Steam. GRAIN ROT currently has no public matchmaking.

Quick facts

Solo play
Yes
Lobby type
Player-hosted Steam lobby
Public matchmaking
No
Each player needs a copy
Yes
Player count
The official FAQ says the game is roughly balanced around four players, but does not state a fixed cap.

How co-op works

GRAIN ROT can be played solo or in online co-op. Co-op runs on player-hosted Steam lobbies rather than dedicated matchmaking servers, so one player hosts and the others join. Every player who wants to join needs to own their own copy of the game.

Step-by-step: invite friends

  1. Start or join a player-hosted Steam lobby.
  2. Use Steam's friend/invite flow to invite people who own the game.
  3. If you need teammates, use the official Discord LFG/community channels.

How many players?

The official FAQ says the game is roughly balanced around four players, but it does not state a fixed cap. We are not listing a hard player limit because the source material does not confirm one.

Common questions

Is there public matchmaking?
No. GRAIN ROT currently has no public matchmaking. Co-op is arranged through player-hosted Steam lobbies and Steam invites.
Can I play solo?
Yes. GRAIN ROT supports solo play as well as online co-op.
Does everyone need to own the game?
Yes. Each player who joins a lobby needs their own copy of GRAIN ROT.
Where do I find people to play with?
Use the official Discord's LFG and community channels to find teammates who own the game.

Sources

Official sources are marked. Community sources are labelled separately.