From ebgames.com:

Darkwatch, the debut title from Sammy Studios internal development, is a cinematic 1st person shooter with an original premise that blends Vampire-Horror and Western genres. The Darkwatch is a vigilant strike-force that has protected man from evil incarnate since the dawn of civilization. Their newest and deadliest agent is Jericho Cross, an outlaw gunslinger pulled into their ranks by an unfortunate close encounter with a vampire lord.