Warzone2100/warzone2100 ? reverse-engineered prompt

Build me a playable open source 3D real time strategy game inspired by Warzone 2100, where you command a post apocalyptic army, build a base, research new tech, and design custom units.

I want a story driven single player campaign, a skirmish mode against AI bots, and online multiplayer for up to 10 players with team play and free for all. Make it feel polished and modern, but keep the classic RTS flow of gathering resources, expanding your base, and fighting with different unit types and tactics.

It should run on Windows, macOS, and Linux, and support a few graphics options so it works on a range of machines. If you need to check current docs or APIs while building, go ahead and look them up.