I've been following this Source mod for years since I first heard about it in 2005.  I briefly mentioned it in passing in the 'What song are you listening to' thread, since one of the most impressive things about the mod is the music that is being released within it by a guy called Ed Harrison.

Bits of artwork floating around during development by a guy called pushbak were also inspired, giving that isolated modern urban feel.  Think the dirty side of Mirror's Edge.  The concept of two warring factions within a dystopian city filled with the grit and graffiti which make the world feel tangible, isn't original but reminds you of great pieces of cinema and like Bladerunner and Ghost in the Shell.

The actual game is a full-sized mod for the Source engine (akin to Black Mesa: Source) and is a class-based multiplayer tactical shooter, much like Team Fortress.  It originally started its life as an Unreal Tournament 2k4 mod, which when HL2 and its Source engine came out kind of shat all over it!  So they jumped ship and joined the other team.

Anyway, they've finally released a snazzy trailer and loads of media prior to the imminent release, along with many of the songs that made me interested in the game initially.  So I really recommend checking them out.  The track called 'Out' (4th or 5th one in) is what really grabbed my attention all those years back.

http://www.neotokyohq.com/index.aspx