This is incredible.
Athena Crisis is an example of how to build a high-quality video game using only JavaScript, React, and CSS. By open-sourcing Athena Crisis, we are following through on our commitment to open source our core technology and help push the Web forward as a game development platform.
I absolutely love browser-based gaming. But there's not a lot of resources to learn how to build anything advanced beyond the casual games. After a while, every browser game migrates to a "real" game engine. Which makes sense. But doesn't help push web games.