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UE4SS

The official RE-UE4SS script loader, unchanged, with one ready zip per tested Unreal game: UE4SS plus that game's config.

by KintaroModding · for 2 games

  • MIT · open source
  • 0
  • v3.0.1-1181-g83330635
  • Updated 1 day ago
  • Fork of UE4SS-RE/RE-UE4SS
  • Tools
  • Library
Description

UE4SS

The official RE-UE4SS script loader, unchanged, with one ready zip per tested Unreal game: UE4SS plus that game's config.

What it does

UE4SS (Unreal Engine 4/5 Scripting System) loads Lua and C++ mods into Unreal Engine games while they run. Many mods need it. This listing republishes one official UE4SS build, so it can be found on openmods:

  • UE4SS v3.0.1-1181-g83330635: the official experimental-latest build of 2026-10-17 (commit 83330635). The stable UE4SS releases (v3.0.1 from 2024) are too old for many Unreal Engine 5 games.
  • One ready zip per tested game: the official UE4SS files, plus the UE4SS team's own config for that game when the team has one (from zCustomGameConfigs.zip of the same build).
  • Nothing else: no file is changed, and no mod is added. The official files of the build are attached to the release as well, so you can compare.
Game Zip Config Tested
The Blood of Dawnwalker dawnwalker_ue4ss_v3.0.1-1181-g83330635.zip TheBloodOfDawnwalker (the UE4SS team's) Patch 2, 2026-10-22
Clair Obscur: Expedition 33 expedition33_ue4ss_v3.0.1-1181-g83330635.zip none: the UE4SS team has none, and the default settings work 1.5.6 (Steam), 2026-10-23

Screenshots

UE4SS

How to install

  1. Close the game.

  2. Download the zip for your game (table above) from the latest release on GitHub.

  3. Unpack it into the game's Binaries\Win64\ folder, next to the game's exe:

    • The Blood of Dawnwalker: Dawnwalker\Binaries\Win64\, next to Dawnwalker.exe.
    • Clair Obscur: Expedition 33: Sandfall\Binaries\Win64\, next to SandFall-Win64-Shipping.exe.

    You then have Win64\dwmapi.dll and the folder Win64\ue4ss\.

  4. Start the game. UE4SS writes its log to Win64\ue4ss\UE4SS.log.

To remove UE4SS: close the game, delete Win64\dwmapi.dll and the folder Win64\ue4ss\.

If you already use another UE4SS package for the game, use only one of them: delete the other one's dwmapi.dll and ue4ss\ folder first, and keep your mods from its ue4ss\Mods\ folder.

How to use

UE4SS mods go into Win64\ue4ss\Mods\<mod name>\. A mod with an enabled.txt file in its folder starts by itself; other mods are listed in Win64\ue4ss\Mods\mods.txt. The build comes with UE4SS's own helper mods: the game console on ~, ^ or F10 (ConsoleEnablerMod), the cheat manager (CheatManagerEnablerMod), a loader for Blueprint mods in the game's Content\Paks\LogicMods\ folder (BPModLoaderMod; Dawnwalker\Content\Paks\LogicMods\ or Sandfall\Content\Paks\LogicMods\), and keys for dumps (Keybinds).

Compatibility

  • The Blood of Dawnwalker: Patch 2 (dw1-pc-258504-shipping-patch2-all-CL-258504, Unreal Engine 5.5.4). Tested on 2026-10-22: main menu, save loads, the helper mods, and a Lua mod.
  • Clair Obscur: Expedition 33: 1.5.6 (1.5.6.0, Steam; Unreal Engine 5.4.4). Tested on 2026-10-23: game start, save load, the helper mods, and UE4SS's header and mapping dumps.
  • Other games are not tested here. For them, use the official UE4SS_v3.0.1-1181-g83330635.zip with your game's config from zCustomGameConfigs.zip, if the UE4SS team has one.
  • A game update can need a new UE4SS build or config. Then check the UE4SS releases for a newer build.

Known issues

  • The UE4SS log shows optional engine functions that were not found: FUObjectHashTables::Get and ConsoleManagerSingleton in The Blood of Dawnwalker, ConsoleManagerSingleton in Clair Obscur: Expedition 33. UE4SS works without them; no problem was seen.
  • This is an experimental build of UE4SS. Report problems with UE4SS itself to the UE4SS issues, and problems with this package here.

How to build

This package builds nothing: it repackages the official build. Building UE4SS from source needs Visual Studio and access to Epic Games' Unreal source; see the UE4SS documentation. FORK.md lists exactly what this repository adds to UE4SS.

Credits

UE4SS is made by the UE4SS-RE team and its contributors, MIT license. This listing and package: Kintaro. MIT license, as UE4SS. This package is unofficial: the UE4SS team did not make it and does not support it.