01
Multiplayer
Learn what is confirmed about online co-op, Steam lobbies, invites, group size, and public matchmaking.
Read guideIndependent Fan Guide · Launch Build
GRAIN ROT Hub
Guides for multiplayer, Living Sparks, Vessels, Rot corruption, solo survival, and current GRAIN ROT mechanics.
- Released Aug 7, 2026
- Online Co-Op
- Single-Player
- Windows PC
Guide Library
Start With a Verified System
Five focused guides answer current player questions while keeping launch-version evidence and unknowns visible.
02
Rot Sickness
Separate official Rot and mutation facts from unverified cure, contagion, meter, and persistence claims.
Read guide03
Spark Abilities
Understand the Living Spark, vessel loss, bodyless play, fading, possession, and the current evidence gap.
Read guide04
Solo Guide
See what single-player support confirms and which scaling, pause, and vessel-loss details still need testing.
Read guide05
Vessels
Learn the verified relationship between fragile wooden bodies, possession, swapping, abilities, and extraction.
Read guideAbout the Game
What is GRAIN ROT?
GRAIN ROT is a first-person horror co-op extraction builder developed by Beck & Branch Games and published by Neem. Living Sparks inhabit fragile wooden vessels, descend into procedurally shifting underground areas, salvage what they can, and return to rebuild the Outpost.
The deeper descent brings greater Rot, body corruption, mutation, hostile Corrupted vessels, and the risk of losing unsecured loot. This site explains only what current first-party sources and carefully labeled supporting evidence can establish.
Read the Multiplayer GuideDeveloperBeck & Branch Games
PublisherNeem
ReleaseAugust 7, 2026
PlatformWindows PC · Steam
ModesSingle-player · Online Co-op
Current Evidence, Clear Limits
Plan the Next Descent
Start with the co-op setup, then follow the linked system guides without relying on unsupported counts, tiers, locations, or launch-day guesses.