Natural-Selection 2

I could make an evolution joke... but I won't.

Restart/Launch your Steam Client to get the update.
Whilst it's downloading you can read the changelog here:
http://www.unknownworlds.com/ns2/news/2010/7/ns2_alpha_patch_released

And a glimpse of it here:

Quote:

Technical * Fixed bug where a client would continue to try and connect after the server reported that it was full or the client was using the wrong protocol * Fixed bug where clients could only connect to servers on the default port * Fixed bug where the port was removed when connecting via console command * Fixed bug on multi-monitor systems that resulted in a graphics reset loop * Fixed window border when switching from fullscreen to windowed * Fixed bug where key events outside of the game's focus window would sometimes be processed by the game * Fixed bug where the dedicated server could not be run without Steam running * Fixed duplicate attack/fire key bindings that caused mismatches * Fixed voice chat to use in-game sound volume on playback * Fixed bug where where clients could timeout while alt-tabbed from the game in fullscreen mode * Fixed bug where binding a game server to an IP would cause it to not be displayed in the server browser * Added client-side timeouts when attempting to connect to a server * Added support for closing a dedicated server by pressing ctrl+break * Added alt-enter to toggle between fullscreen and windowed mode * Added dedicated server files to the Steam release * Added Toggle Console binding to UI settings

There's a long way to go, but the devs are definitely committed to getting there.