Open-Source reimplementation of Westwood’s Command & Conquer: Red Alert game engine, updated to use the hardware acceleration of modern video cards using OpenGL and OpenAL for sound playback. It runs natively on Windows, Linux and Mac OS X. The game was designed with modifiability in mind, but is not identical to the original. Campaigns and mods made for the legacy game won't work out of the box.
I am wondering why there are two different Open Source projects using such similar names. The developers are completely different and where they host their source code is completely different. The first two are the same group (Sourceforge & Google Code)
Sourceforge (C++ code) OpenRedAlert
Damien Carol, Juha Laukkanen, Felix Schmutz
Google Code (C++ code) OpenRedAlert
Damien Carol, Felix Schmutz, niakcs9, locutus.unimatrix01, roytam
GitHub (.Net/Mono code) OpenRA
alzeih, Matthew Bowra-Dean, Chris Forbes, Paul Chote
Seems to me that OpenRA should in reality be called .NetRA. Since they are using .NET which is tied very closely to Microsoft and in reality isn't all that open. There are still chunks of .NET that can not be ported to Mono because Microsoft won't release any information about those parts and won't approve the cloning of them. So .NET/Mono is not a great choice for an Open Source project that is trying to be cross platform compatible. It seems to me that both groups could be working together to make one code base even better but instead we have two projects duplicating the same exact work.
Some might say Novell is paying for their mistakes with Microsoft and the whole Mono controversy. The buyout of Novell by Attachmate has left Mono in limbo. Attachmate has not assigned it to anyone specific in their dividing up Novell's divisions. OpenSUSE in Germany (open source division) did not get Mono. I suspect that Mono is going to die on the vine, which makes it a bad choice for a development platform for anything on the UNIX side of thing. It basically makes OpenRA a Windows only program.