OpenRA is great, it feels like a better version of Red Alert 2.

The one thing I'm missing is C&C Generals and Zero Hour. Those were also really fun to play over LAN.

I didnt check what makes OpenRA special but theres open source efforts to „remaster“ generals and zero hour.

https://github.com/TheSuperHackers/GeneralsGameCode

A better version of Red Alert 2 is insanely high praise.