In 2006 Microsoft released a modified version of the source code along with most game assets (i.e. everything needed to compile the game without networking support and without all the art) under a Shared Source licence in order to demonstrate its XNA Build system. Source is available from Microsoft's downloads site.
This is the Shared Source release for MechCommander 2. This release contains all of the source code and source assets required to build MechCommander 2. This release can be used with the Microsoft XNA Build March 2006 Community Technology Preview (CTP).