Late last year, Red Alert: A Path Beyond 2.1 became available for download. Reaching further back to last April, the older version RA:APB 2.0 was released here on ModDB with plans for a release on the Desura service, the ModDb answer to Valve's Steam platform. That fell through, however, and as of June 2011 we had given up on it happening and stopped bothering with that.
Somehow, a version of RA:APB 2.1 has become available for download (at least temporarily?) from Desura for February 2012. From what we can tell, around 400 users have been able to download and install a copy in the past three weeks.
The problem is, this installation from Desura does not seem to give you the vital Microsoft DirectX 9 components needed to play, and most likely won't install the Microsoft C++ components either. A warning is thrown and the game closes instead of connecting to a server.
Sorry for the trouble. We're trying to figure out what happened. If you're looking to download the game, please use the downloads section.