OpenRA is an open source project that recreates and modernizes classic real time strategy (RTS) games , like:
- Red Alert
- Command & Conquer
- Dune 2000
Available from official Arch/Manjaro repository:
Installation:
yay -S openra
After installation, the menu contains the launchers needed to run games. Game files will be downloaded after the first launch.
Additionally, we can also install optional files: the full motion video and music soundtrack.
Good old games 
Project website: