STS2 Mod Manager

Simple Windows mod manager for Slay the Spire 2.

What the program does

This tool helps you manage mods without manually moving folders around.

• Shows which mods are currently enabled in the mods folder.
• Shows which mods are disabled in a separate disabled-mods folder.
• Lets you enable or disable a mod by moving its folder between those locations.
• Can import mod .zip archives by drag-and-drop or by opening the program with archive paths.
• Detects duplicate mod IDs and lets you choose whether to keep the existing mod or replace it.
• Includes a dedicated config dialog for game path, language, disabled folder name, and launch settings.
• Can restart Slay the Spire 2 either through Steam or by launching the game executable directly.
• Supports custom launch arguments such as --force-steam, --seed, --nomods, and multiplayer-related flags.
• Includes a save manager for moving save data between vanilla and modded save slots.
• Supports English and Simplified Chinese.

The app tries to find your Slay the Spire 2 install automatically by checking parent folders, Steam libraries, and common install paths. You can override that path manually from the config dialog if auto-detection is wrong for your setup.

Release versions

Two executable variants are built:

• ModManager.FrameworkDependent.exe
• ModManager.NativeAot.exe

Framework-dependent release

Use this if you already have the required .NET Desktop Runtime installed.

• Smaller download size.
• Depends on the matching .NET runtime being present on the PC.
• Easier to rebuild and debug during development.

Native AOT release

Use this if you want the simplest standalone executable for end users.

• Self-contained Windows executable.
• Does not require the .NET runtime to be installed separately.
• Usually starts faster.
• Typically produces a larger file.

Which one should I use?

• For sharing with most players: use ModManager.NativeAot.exe.
• For your own machine if you already use modern .NET tools: ModManager.FrameworkDependent.exe is fine.

Build

Run the build script from this folder:

STS2ModManager.build.cmd

Optional build modes:

STS2ModManager.build.cmd framework
STS2ModManager.build.cmd aot
STS2ModManager.build.cmd all