Hmm, hadn't heard of it either, just followed the above link and... yeah, looks like someone's tried to slap together various parts of other games with a HUGE emphasis on the different sides.
I hate to say it, but it looks like it's been done before and better.
Although it is running on the Source engine, which is nice.
Do check out the About section though, looks like the original dev team went off to find better jobs, leaving the game to be finished by others.
After a brief trip to the wikipedia page:Nuclear_Dawn [http://en.wikipedia.org/wiki/Nuclear_Dawn]
It looks like this has had one hell of a difficult birth, i think i'll steer clear of it.
But do let us know how it all turns out. You never know
