Osu Touch Grass

Not a meme, its actually playable, surprizingly smooth

Features

Actual osu!lazer running inside Minecraft (osu 2026.505.0 / osu-framework 2026.428.0, built from source, embedded in the JVM via CoreCLR) (I'm not that crazy to actually rewrite Osu in java)
Running on arbitary-sized monitor block rectangle (need redstone signal to launch)
Multiple independent screens coexist (but who needs that?)
Crafted items: osu! Pen, Mouse, Keyboard, combined items (hold in hand to control Osu input). Hold Shift to interact with Minecraft while playing Osu
Full network transport layer re-implementation over Minecraft packets:
- Per-world leaderboards with weighted pp rankings
- Score submission + pp earned as a stackable item in your inventory (what?)
- Friends, profile pages, presence, chat
- Spectator mode (replay-frame relay between players)
- Multiplayer rooms (HeadToHead only for now) with beatmap downloading

Custom maps

Drop .osz files into <minecraft>/osutouchgrass-maps/ to import them.

How it works

First boot extracts ~370 MB of bundled CoreCLR + osu! binaries to <minecraft>/osutouchgrass-cache/. Game data (beatmaps, scores, settings) are stored at <minecraft>/osutouchgrass/, isolated per Minecraft instance.

Dependencies

Minecraft 1.21.1
NeoForge 21.1.72+
Architectury API 13.0.8+
Windows x64 only. Linux / macOS support is not implemented yet.

Credits

osu! by ppy — MIT (code) + CC BY-NC 4.0 (game resources)
.NET / CoreCLR by the .NET Foundation — MIT
BASS audio library by Un4seen Developments — free for non-commercial use

But why?

OSU Touch Grass