GRAIN ROT is a co-op extraction horror where you play a Living Spark riding fragile, flammable wooden vessels into a scorched wasteland. Descend with friends, scavenge loot, survive the Corrupted, and rebuild your Outpost — death is only a change of vessel.
Your first hour in the ruins: Living Sparks, Vessels, scavenging, and how to extract alive.
How many players, party & password-server settings, and team strategies for squads up to 4.
Every Corrupted type, their detection model, and whether to fight, avoid, or troll them.
Rebuild the Sanctuary Outpost: stat upgrades, rescued survivors, and deep-layer progression.
Every page below answers one specific question about GRAIN ROT, written from cross-verified Steam, patch-note and community sources.
GRAIN ROT is a co-op extraction horror builder from Stockholm indie duo Beck & Branch Games (Michel Strömbeck & Nikolai Nyqvist) and publisher Neem Interactive, released on Steam August 7, 2026.
You play a Living Spark — an artificial soul inhabiting a fragile wooden Vessel — descending into procedurally shifting underground ruins to scavenge loot before the Corrupted close in. What you haul back rebuilds your Outpost, and deeper dives bring rarer loot and stranger mutations.