Ghost in the Cave , an interactive collaborative game using non-verbal communication is a collaboration including four partners within the MEGA project: Speech, Music and Hearing, KTH, Stockholm; Octaga/ Telenor, Oslo; DIST InfoMus Lab, University of Genoa; DEI, University of Padua; and with CID, KTH, Stockholm.

A collaborative game in which two teams of players use the voice or body gestures for input control. Players not directly involved in controlling the avatars are participating by influencing the music through movements. The task is to navigate in the 3D world and to find three caves. Within each cave the players do an "emotional" task.