GRAIN ROT mods: the Thunderstore list and how to install them
Quick answer
GRAIN ROT mods live on Thunderstore. You must install unreal-shimloader first and then the GrainRot UE4SS overlay — the game runs on Unreal and stock UE4SS fails with "PS scan timed out" without it. The most downloaded gameplay mods are RotRadarMinimap and TyrnelQoL.
Install these two first — or nothing works
GRAIN ROT runs on Unreal. Stock UE4SS detects the engine but cannot resolve three symbols on this build, so it gives up with Fatal Error: PS scan timed out and never initialises. The GrainRot UE4SS overlay supplies the AOB signature overrides that fix it.
| Prerequisite | What it does |
|---|---|
| unreal-shimloader by Thunderstore | The mod loader itself. Provides Thunderstore Mod Manager and r2modmanPlus support for RE-UE4SS. Install this first. |
| GrainRot UE4SS by Thunderstore | The Grain Rot–specific UE4SS overlay. GRAIN ROT runs on Unreal, and stock UE4SS detects the engine version but cannot resolve three symbols on this build — it gives up with "Fatal Error: PS scan timed out" and never initialises. This overlay supplies the AOB signature overrides that fix it. Other Grain Rot mods should depend on this package rather than on unreal-shimloader directly. |
Other Grain Rot mods should depend on GrainRot UE4SS rather than on unreal-shimloader directly. The overlay also disables the loader's CheatManagerEnablerMod, ConsoleEnablerMod and ConsoleCommandsMod, which would otherwise expose the game's own Debug* commands through the console.
The mods
| Mod | Author | Category | What it does | Downloads |
|---|---|---|---|---|
| RotRadarMinimap | Mentalize | Quality of life | A toggleable R.E.P.O.-style live minimap. Press M inside a dungeon; it auto-rotates to your spawn facing and shows teammates in their Spark colours. | 654 |
| CoinBeams | Mentalize | Visuals | Borderlands-style loot beams over coins — gold beams on gold coins, purple on artifact coins, with rising sparkles, so you can spot a dropped coin across a dark room. Client-side only. | 562 |
| TyrnelQoL | Tyrnel | Quality of life | Seven switches for the places the game wastes your time: furniture stays put, things stop breaking, gold picks itself up, rotate objects in your hands, a shorter wait at the lift, mouse-wheel support, hold to attack. All off until you enable them. | 441 |
| RotVitals | Mentalize | UI | Floating enemy health bars with a live health value, a damage-lag ghost bar and a hit punch. Deliberately does not let you read enemies through walls. | 371 |
| GripAndFlip | Mentalize | Tools | Three-axis rotation for held objects. Hold Left Alt and move the mouse to grip and flip, or use the arrow keys and numpad for precise steps. Host-side, so unmodded friends can join freely. | 200 |
| RotScaling | Mentalize | Difficulty | Enemies scale with dungeon level — more health, harder hits, a little more speed and crit — so difficulty keeps up once your gear outgrows the curve. Host-only, joiners need nothing. Fully tunable. | 81 |
| TyrnelExtra | Tyrnel | Content | A dungeon map, orders for the game’s named companions, and depths that get deadlier the further you go. Requires TyrnelQoL for its menu. | 52 |
Download counts are a snapshot taken on 2026-09-02 and change over time.
Install order
- Install a mod manager — Thunderstore Mod Manager or r2modmanPlus.
- Create a Grain Rot profile and select GRAIN ROT as the game.
- Install unreal-shimloader through the manager (it is the loader itself).
- Install GrainRot UE4SS. Without this overlay the loader will fail on Grain Rot’s Unreal build.
- Install the mods you want. Dependencies resolve automatically.
- Launch through the mod manager, not through Steam directly.
Before you mod
Mods are client-side or host-side depending on the package — check each mod’s page before joining a friend’s lobby. Modding is unsupported by the developers: back up your Outpost save before installing anything, and expect mods to break after game updates.
One specific trap: some mods are host-only (RotScaling, GripAndFlip) and some are client-side visuals (CoinBeams). Check each mod's page before joining a friend's lobby, because a mismatch is the most common cause of "my mod does nothing".