Looks like a clean-room implementation [1]

[1] https://github.com/OpenRA/OpenRA/wiki/FAQ#is-that-legal

Sounds like hard work, lots of respect to the makers.

Would be incredible if EA released the source code like Id did for doom.

Tiberian Sun and RA2 have been "in development" since 2013

Unfortunately it requires overhauling OpenRA in its entirety, so progress has been glacial

It's heartening to hear, it's no surprise it's a monumental workload. Huge props to those making it happen.

Romanov's Revenge