Bureau 13

This is a puzzle, adventure game about an ultra-secret organization called Bureau 13, whose operatives investigate paranormal phenomenon. After one member of the organization draws unwanted attention, the Bureau decides to neutralize him by sending two agents. The game offers many characters to choose from such as thief, priest, mech and vampire... Since each character has different skills, each puzzle can be solved in a number of ways, leading to different endings. (mobygames.com)