🧀 Crispy Launcher

A desktop launcher that installs, prepares and starts the Rust Minecraft client — the Horizon launcher, rebranded to Crispy Launcher, with its look kept under our control so an upstream update cannot put the old UI back.

Download it from the releases page (Windows installer, Linux AppImage) or from the website.

You need a Microsoft account that owns Java Edition, and a GPU with Vulkan or OpenGL 3.3 (Linux), Vulkan or DirectX 12 (Windows), or a Mac on Apple Silicon. If you already have a Minecraft install (official launcher, Prism, MultiMC…) it is reused; without one, Play downloads the game from Mojang for your account.

What it does

• Versions — lists the builds it can install, downloads one, and removes it again.
• Play — prepares the game from your own copy of Minecraft and starts it, as you.
• Accounts — signs in with Microsoft, checks Java Edition ownership, and keeps the session in the OS keychain (Keychain, Credential Manager, Secret Service).
• Mods, modpacks, servers — browse and install, import a Java modpack, host a world for friends.

Step by step: launcher/README.md.

Run it from source

The launcher is its own Cargo workspace, built with GPUI:

cd launcher && cargo run --release

Updating without losing the UI

git remote add upstream https://github.com/horizon-rust/horizon.git
./scripts/sync-upstream.sh

The script fetches upstream, merges it, restores our version of every path in crispy-ui.txt, re-applies the rebrand to the strings upstream added, and records the merge as one commit. The launcher's own self-updater is switched off in launcher/src/backend.rs, because it used to replace this binary with upstream's — wiping the UI. Details: docs/upstream-sync.md and CRISPY.md.

Credits

A fork of horizon-rust/horizon, MIT licensed. The original copyright notices stay: LICENSE and THIRD_PARTY_NOTICES.md must ship with every copy.

Not an official Minecraft product, nor approved by or associated with Mojang or Microsoft. This repository contains no Minecraft code, assets or data.