See Whispers in the West - Co-op Murder Mystery in vid form, watch here.
"Whispers in the West is a point-and-click murder mystery game that supports online co-op for 1-4 players. Each story is an hour-long intriguing mystery waiting to be solved. You can either work solo or team up with your friends to solve the cases. Things may get heated!"

At a glance categories:
Mystery, Online Co-Op, Point & Click