I still occasionally fire up Wolfman-X's version of MechCommander 2, which I contributed a little source to at one point.
I think MechCommander 2 is kind of... meh code under the hood (if you weren't aware, the source for it is available for free) and relies on a magical 32-bit DLL that no source is available for (heck, the company that made it is long-dead as well, so probably nobody on Earth has the source). I at one point looked at the 32-bit-to-64-bit wrappers for that problem, as one of the biggest problems with MW2 is that it's shockingly memory-starved, but frankly, it looked like too much work for something I would just give away, lol.