Oh you said RTS, interesting 

 Veloren is pretty cool. 

 Open source too. Easy to compile and run. I am a fan. 

 Their team helped me get it to run on a Pixelbook Go for the laugh. It worked, but it ran like ~5FPS 🤣

They’re good folks and don’t mind hacking for the joy of it. 

 No. I will try it.

The gameplay experience I want to replicate and build on is the Eve Online experience. Massive PvP battles (thousands of ships on screen in system at a time), lots of ship roles (sensor jamming, tackling, shield boosting, transport, etc), fights for territorial ownership, plenty of opportunity for spys/subterfuge, make your own way, complex mechanics that takes years to learn. 

 I havent! I'll check it out!