In Greek mythology, it is said that a young man named Orpheus used the "tone of the lyre" to put Cerberus to sleep, and in The Awakening of Cerberus, all three heads start the game asleep. The two players want to collect all the souls of their allies while not losing their own lives in the process. To that end, it is important for you to co-ordinate your strategies since Cerberus may wake if the strategy shifts. An awakened Cerberus head will attack to re-capture the souls it has collected, but you can possibly send it back to sleep. Due to the darkness of the Netherworld, however, free communication between the players is restricted.