GRAIN ROT
by Beck & Branch Games · 7 Aug, 2026
240 downloads
About the Game
You are a Living Spark surviving inside fragile wooden vessels that splinter, collapse, and catch fire. When your vessel breaks, the Spark escapes. Death is just a change of scenery.
Ride a cursed elevator into shifting underground ruins with your crew. Smash furniture for resources or feed them into the Grinder for gold. If everyone breaks, your loot is lost.
Trolling can become your friend’s demise. Dropkick enemies or “accidentally” launch your ally’s Spark out of their vessel. Block them in a monster-infested corridor or get stuck in the crossfire. Will your group handle the chaos you created yourselves?
The deeper you go, the worse the Rot becomes. Bodies warp. Voices distort. Emotes become…worse. Or possibly better?
The Deep Layers are filled with Corrupted vessels, reacting to sound, movement, and each other in ways that are impossible to predict. Fight. Build. Run. Panic.
When your vessel breaks, you stay in the run as a Spark. Guide your team through the dark and search for another host with a new set of abilities. Force your way back in before you fade out completely.
Everything you haul back rebuilds your Outpost. Unlock interactive furniture, stat upgrades, rescued survivors, and stranger ways to survive the next descent. The stronger the outpost becomes, the deeper you can afford to go.
Go deeper. Extract more. Leave someone behind. Make it back and build together.
Or don’t come back at all.
FEATURES
Possess and swap between fragile wooden vessels
Co-op extraction horror with physics-driven chaos
Tactical carpentry with interactive furniture
Procedurally shifting underground dungeons
Persistent Outpost rebuilding and progression
Rage-bait your friends with cursed emotes
Rescue survivors trapped in the Deep Layers
Body corruption and mutation systems
Questionable cosmetics
Screenshots
11 images
Version Information
Steam Patch Notes
Official update history
- Fixed a bug where gamepad navigation was not working when selecting game mode.
- Fixed a bug where you could not delete a savefile using gamepad.
- Changed so the wardrobe has all the cosmetics available from room upgrades in Expedition.
- Small vessels can now change color patterns.
- Improved hitbox orientation for the players melee weapons.
- Fixed an issue where burning Grain Rot in the Deep Layers could complete the “Kill It With Fire” quest.
- Fixed so you can still burn the upper floor Grain Rot even after “Kill It With Fire” has been completed.
- Fixed an issue where cosmetics was saved using unstable IDs for small vessels.
- Fixed a crash in the Grain Rot infection system.
- Added a timestamp to the dungeon run so you can see how much time you spent.
- Added current dungeon run info which is visible in the build menu.
- Adjusted a painting that could not be picked up in one of Hollow Halls trap rooms.
- Added a new enemy: "Corrupted Builder".
- Added item slot hooks to the expedition elevator.
- Flashlight is now positioned correctly on small vessels.
- Adjusted loot cabinets and chests so they can no longer push the character through geometry.
- Improved elevator stability during descent, resulting in fewer issues for characters and objects inside.
- Added unstuck logic when exiting a chair or bed.
- Added unstuck logic when possessing a character with your spark.
- Added a loot spot in the bathroom in Withered Manor.
- Fixed a bug where the dungeon shop would only spawn gumballs.
- Fixed a bug where you could insert too many coins into the gumball machine.
- Fixed a bug where outpost doors could be broken and interacted with after breaking.
- Fixed a bug where the player's arms would stay extended for a short duration after an object was destroyed.
- Fixed a bug where small vessels spawned less frequently than expected and occasionally on the floor.
- Fixed a bug where the character could get pushed far across the room after a dungeon run.
- Fixed an issue where server profile cosmetics were not preserved when restarting an expedition.
- Fixed a bug where the furnace heat bonus would be calculated incorrectly after loading a save.
- Fixed a bug where the train and ball trap could knock the spark out of the map.
- Fixed a bug where the dungeon map texture would repeat.
- Fixed collision issues at the top of the Basement Stairs in the outpost.
- Fixed environment holes in Rainbow Wards, the Expedition floor, and ice caves.
- A new harcore gamemode called Expedition implemented.
- The Rainbow Ward, a new biome implemented.
- Color pattern cosmetics are implemented and can be unlocked in Expedition.
- Fixed a bug where constructs would initially display the wrong durability after a game load.
- Fixed a bug where the voice volume slider did not affect sparks.
- Low glow sparks now have an even higher voice pitch.
- Fixed a bug where you could damage Bozy The Clank, even though he is not visible.
- You can no longer damage Bozy The Clank during his spin the wheel phase.
- Fixed a bug with the ferris wheel in the Hollow Halls which caused the platforms to be oriented wrong for clients.
- Changed so Withered Manor and the Frozen Vaults only spawns 1 loot room instead of 2, like the rest of the biomes.
- Starting the elevator is now an anti grief protected action.
- Renaming Signs and rooms is now anti grief protected actions.
- Added a scroll box to the cosmetic selection UI.
- Items in the shop are now saved during sessions.
- Changed the maximum number of save slots to 5.
- Added support for renaming save files.
- Improved the death effects of the Rotlurker.
- Fixed a bug where the interact prompt was not visible when you had full inventory.
- Fixed a bug where objects brought back from the deep layers had their size reset after reloading the save.
- The compass item can now be recalibrated to point towards the Deep Layer grinder.
- Fixed incorrect scrap value for the Vibe Modulator.
- Improved performance of the Vibe Modulator Visual Effect.
- Health and stamina regained from resting on constructs are now percentage based.
- Fixed a bug where you could clip through walls using chairs.
- Fixed a bug where items saved on an uncontrolled character would end up floating in the air.
- Added a new small Vessel named Boing.
- Added 7 new buildable constructs. (3 common, 1 rare, 1 epic, 2 legendary)
- Small Vessels can now carry and hold up to one item.
- Grief protection is now implemented as a setting which can be turned off per player, it hinders players to perform potential harmful actions outside of the Deep Layers.
- Improved password protected server security.
- Added search filter and an icon for password protected servers.
- Ban players are now persistent across sessions.
- Fixed so renaming save files in the OS and copying them to different slots now works correctly.
- Reducing cosmetic spawn count in dungeons from 2 to 1.
- Fixed a bug where carrying multiple Shade Spears could cause them to not block the sun.
- Improved collision of some treasures.
- Improved collision for bunkbed mesh.
- Improved collision for walls in the brimstone citadel biome.
- Fixed collision holes in the Pressure Plate room in Hollow Halls.
- Fixed bug where the battery item did not break when reaching zero durability.
- Fixed a bug where the player could change eyes and badges on small vessels.
- Fixed an issue where glow particles could disappear when too close to the environment.
- Fixed a bug where some actions could not be rebound correctly.
- Fixed a bug where if you had bound the crouch hold action, it could cause the spark move down action to get stuck.
- Network replication improvements for placing new constructs.
- Fixed a bug where items could display the wrong durability for clients.
- Tweaks to Wailer’s attack patterns so it doesn’t use AoE attack immediately when blocked by constructs.
- Added another melee attack for Wailer.
- Fixed bug where spamming New/Load Game could cause issues during the level transition.
- Fixed a bug where new construct notification dots appeared after reloading a save file.
- Fixed a navigation bug in a fall room in Withered Manor.
- Public servers are now available to join via an in-game browser.
- Added more host game settings under the multiplayer options tab.
- Added support for password protected servers.
- The friends only and invite only privacy mode now allows for friends of anyone in the server to join, not just the host.
- Added a new hat that can be found in the Deep Layers.
- Fixed so Quill shouldn’t catch fire on his patrol route outside the Outpost.
- Fixed a bug where a legendary gumball would not give any reward.
- Added security measurements for incoming connection.
- Fixed missing Localization.
- Fixed a bug where you could not join friends when lobby privacy was set to friends.
- Added start/stop follow animation and sound for Little Buddy.
- Fixed an issue where the items owned by a client gets destroyed when they leave the game. They should now either be dropped on the ground or moved to the lost and found crate.
- Fixed bug where the player could not respawn because the area was blocked.
- Fixed a bug where Grain Rot was visible through certain unrepaired ceiling modules.
- Fixed so Vessels can now be on all balconies without taking any fire damage.
- Fixed Mini Plant’s collision so it’s easier to place on shelves.
- Added multiplayer settings for lobby privacy and max player count.
- Added a view lobby menu where you can adjust player mic volume and kick / ban players.
- Fixed a bug where a bunker door in the ancient facilities could not be opened by clients.
- Fixed a bug where the save file could load into a black void.
- Fixed bug where key bindings did not save correctly.
- Added a welcome message for when a new player joins the game.
- Added a hatch above the elevator for people who like to break the physics engine.
- Double fixed a bug where you could not pick up coins or the fuse in some boxes in the deep layers.
- Fixed a bug where you could not load a save file while offline from Steam.
- Fixed a bug where constructs attached to a wall did not correctly apply the attach state after loading a save.
- Fixed a bug where stacked objects could start vibrating indefinitely when disturbed.
- Fixed a bug where a mesh related to a boss in the deep layers could appear at the outpost after a dungeon run.
- Fixed a bug where picking up a mallet caused it to disappear.
- Fixed a bug where the highscore displayed the wrong number.
- Fixed a bug where the rolling boulder trap was invisible to clients.
Current Release
Build 24989637
Uploaded Aug 28, 2026
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System Requirements
How to Install
Helden.exe to play
Troubleshooting tips
• Run Redist/_CommonRedist installers if game won't start
• Add folder to Windows Defender exclusions
• Run as administrator
Download
Direct link available
Needed when extracting (WinRAR / 7-Zip) — not a site login.
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Download GRAIN ROT for PC with a direct link or via torrent. Get the full version of GRAIN ROT for free. GRAIN ROT is a Action released by Beck & Branch Games.