A fantastic hl2 mod with a brilliant soundtrack, beautiful scenary and fairly good gameplay.

Really hard, and public games can be a pain in the arse as it -really- requires a teamplay effort to get anywhere (or just a team of good players)

You should all give it a shot. 

http://neotokyohq.com/

I think it would be fantastic to play it in competitive leagueplay. Its frustrating playing as the weakest class at times, but so rewarding when you pull off tricky stunt kills.