Version 1.8.3 for Windows, macOS, and Linux

The open-source Slay the Spire 2 mod manager

STS2 Mod Manager helps you follow friends' modpacks, launch safely, track exact mod sources, and keep backups close when a run setup goes sideways.

Download from GitHub Releases View source

App downloads are hosted on GitHub Releases. Nexus Mods and Steam Workshop are supported as mod source integrations, not manager distribution channels.

STS2 Mod Manager Home view with the current top bar interface and fake Daily Cheese Build sample pack
No telemetry Optional accounts only for flows you choose.
Share codes Paste a code or click an `sts2mm://` link.
Source-aware GitHub, Nexus, Workshop, and manual archives stay distinct.
Backups first Launch and restore flows are built around recovery.

Built For Real Modded Runs

The manager is designed for the messy middle: friend packs, pinned versions, update drift, downloaded archives, and Steam-owned Workshop items living in the same library without losing their provenance or confusing Workshop-provided dependencies for missing local files.

Modpacks

Follow, share, and re-share

Install a pack by code or link, keep the same code when a curator updates it, and browse public packs from inside the app.

Repair

Match the game you have

Repair walks release history and chooses the newest mod build compatible with your current Slay the Spire 2 version, while launch checks account for active Workshop dependencies.

Library

Disk state stays visible

The Mod Library separates installed files from active modpack membership, with source labels and row actions where you need them.

Safety

Backups before launch

Automatic backups, restore prompts, and recovery-minded confirmations help you get back to a known-good setup.

Pins

Lock version and state

Pinned mods keep both their version and enabled/disabled state, even when a followed modpack changes later.

Open

MIT licensed

The app is open source, built with Tauri 2, React, TypeScript, and Rust, and releases are built in public.

Current Screenshots

Fresh screenshots use fake sample data and the current topbar interface. The old sidebar layout and changelog/what's-new banner are not shown.

Home view with fake Daily Cheese Build modpack, launch controls, share code, and recent packs
Home: active modpack, launch controls, sync state, and recent packs in the topbar UI.
Modpacks view with fake share code input, update state, and sample modpack cards
Modpacks: follow packs, apply updates, import `.sts2pack` files, or create your own.
Mod Library view with fake installed mods, source labels, tags, and audit controls
Mod Library: installed mods, source labels, tags, audit controls, and active-pack membership.

Source Compatibility

STS2 Mod Manager can work with several mod source types while keeping ownership clear. This is about managing mods; the manager app itself is still downloaded from GitHub Releases.

GitHub releases

Install compatible release assets, update linked mods, and include redistributable release assets in shared modpacks.

Nexus Mods

Link mod pages, audit known sources, open the Files page in your browser, and let the downloads watcher install the saved archive.

Steam Workshop

Subscribed Workshop items appear in the Library and can be referenced by item ID. Steam keeps ownership of the files.

Manual archives

Drag and drop `.zip`, `.7z`, or `.rar` archives when a mod has no source link the app can automate.

Quick Start

From install to launch, the happy path is short.

DownloadGet the latest Windows, macOS, or Linux build from GitHub Releases.
Find the gameLet onboarding detect Slay the Spire 2 or choose the install folder.
Add modsUse an archive, URL, downloads watcher, or existing Workshop subscriptions.
Join a packPaste a share code, click an `sts2mm://` link, import a pack file, or browse public packs.
LaunchThe app backs up first, then starts the active modpack.
Privacy note: there is no telemetry. GitHub sign-in, Nexus API keys, publishing, and support bundles are optional flows you choose inside the app.