Article taken from GamingOnLinux.com.

I do love 'OpenRA' [ Official Site ], especially fun when we did our online Linux tournament. The new release is really great too, with it implementing more of the single-player missions from the original Command & Conquer, Red Alert and Dune 2000.It is a truly incredible project, to keep the original Command & Conquer, Red Alert and Dune 2000 games alive. They are also working on supporting Tiberian Sun at the moment, with Red Alert 2 possible once that is completed.Along with the more complete single-player campaigns, this release also features:- Fixes to a lot of crashes.- Fixes to a number of bugs that impacted game servers, such as the infamous “grey ping bug”.- New configuration options for customizing mouse scrolling behaviour.- New hotkeys for navigating to map edges, and bookmarking positions on the map.- New hotkeys for controlling the music player, as well as producing five units at once.- Improved aircraft reloading behaviour.- And more!It's entirely legal too, as the original games were released completely free, so they are just downloading the officially available free games for their open source engine.