Required
Open project Fabric API
Matching file found for at least one listed target: [1.21.10] Fabric API 0.138.4+1.21.10
Ready to install?
RailOptimization 2.0
Check the game version, loader and dependencies below, then grab this exact release.
Modrinth release
railoptimization-2.0+mc1.21.5-fabric.jar
2.0
- Game
- 1.21.10, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
- Loader
- Fabric, Quilt
- Published
- 18 Sept 2026
- Channel
- release
- File size
- 107.9 KB
SHA-18c3cdab56fe1c364803051b449178fdfa3dddd4a
Where this file goes
Client, server, or both?
Client Do not install
Dedicated server Required
This file is marked server-only.
Dependencies for this release