Kingpin is the 1999, gangster themed, first-person shooter based on the Quake 2 engine:
There is still a small (but dedicated) community, new mods and maps are actively produced.
Big multiplayer games are every Thursday & Sunday, nice friendly crowd!
(around 22:00 CET, 09PM GB, 08AM AU, 15:00 CA, 18:00 BR, 04PM NYC)
And if nobody is around, there's a bot-match server running 24/7...
To play simply download this Multiplayer Starter Pack (1GB) (password: kingpin)
It includes all the mods, maps and custom models you need to play, plug and play.
Join via the in-game server browser, the included GameSpy or visit kingpin.info for news, files, servers and more!
Just look how much fun everyone is having during happy hour, it's energetic: