GGRS is a reimagination of GGPO, enabling P2P rollback networking in Rust. Rollback to the future!
GGRS is a reimagination of GGPO, enabling P2P rollback networking in Rust. Rollback to the future!
GGRS (good game rollback system) is a reimagination of the GGPO network SDK written in 100% safe Rust . The callback-style API from the original library has been replaced with a much saner, simpler control flow. Instead of registering callback functions, GGRS returns a list of requests for the user to fulfill.
If you are interested in integrating rollback networking into your game or just want to chat with other rollback developers (not limited to Rust), check out the GGPO Developers Discord!
GGRS has two demo apps — one written with macroquad, the other with bevy. Both use matchbox for WebRTC-based matchmaking.
Note: The hosted matchmaking server is currently offline, so the links below will not find opponents automatically. You can still open the link in two separate browser windows on the same machine to test locally.
To get started with GGRS, check out the following resources:
GGRS is fairly stable. The core functionality for multiple players and spectators has not changed significantly in recent versions. See the Changelog for the latest changes, including those not yet published to crates.io. If you want to contribute, check out existing issues and the contribution guide!
The authors of GGRS are also maintaining a bevy plugin. Check it out:
If you are interested to run a GGRS application in your browser, check the amazing Matchbox project! The matchbox sockets are compatible with GGRS through a feature flag:
Godot is a popular open-source game engine. marcello505 is developing a wrapper for GGRS. Find the repository here:
Also take a look at the awesome backroll project, a completely async rollback library. Special thanks to james7132 for a lot of inspiration and fruitful discussion.
GGRS is dual-licensed under either
at your option.
No open issues yet, or sync has not completed.