Yes, Nuclear Dawn is still alive and still being updated. I'm actually shocked, but impressed at this. The new version will make the Linux and Mac versions a bit better too.
From the announcement:
QuoteGreatly improved Assault class's thermal vision interaction with Weapon Suppression gizmo on Assault Rifle.
Fixed structure damage being miscalculated when being structure is attacked by another structure or at times with grenades/missles/REDs.
Fixed a crash that could occur when spawning after a round is over
Fixed bots being counted in total players required for a surrender or mutiny vote to pass.
Fixed a few rare client and server crashes.
Decreased memory usage in some areas on both client and server.
Switched MOTD panel to use Steam's HTML rendering rather than directly embedding Chromium, effectively updating it to a much newer and more secure version of the same. (This also fixes some crashes that would occur on Mac and Linux).
Added numerous security-related fixes from other variants of the Source engine.
It still has people regularly playing, so I might have to boot it up and get some games going soon. Anyone interested?
Nuclear Dawn is a mix of top down strategy and FPS action built with Valve's Source Engine.