Renegade X is a tactical First and Third Person Shooter with Real Time Strategy elements, set in the Command & Conquer universe. It is a high quality award-winning free indie game being created on the Unreal Development Kit. Originally, Renegade X was an Unreal Tournament 3 mod, and the beta won six awards, including "#2 Best Vehicle Set" for the Making Something Unreal Contest, "#3 Best Upcoming Mod" for the Mod of the Year Contest in 2008, and "#2 Best Multiplayer" in 2009's MOTY.
In 2010, Totem Arts made the decision to make Renegade X a standalone game, available to everyone. Since then, the team has released a singleplayer mini-campaign called Operation Black Dawn. Black Dawn was released in January 2012, and it is a demonstration of what's to come.
Detailed installation guide: https://wiki.renegade-x.com/wiki/Linux_Guide