A cross-platform JS game engine inspired by React

Declarative API

Replay works differently to traditional OOP game engines. Game logic and rendering is neatly separated using pure functions.

Open Source

Replay is free to use and developed in the open on GitHub.


Build your game once using the latest and greatest frontend tools. Avoid bugs with a built-in testing library, then deploy to web and iOS!

Replay is still in early development, but you can stay up to date on progress by subscribing here: