2 players, each with their own microphone, control the same character by changing the volume of their voices. One fires the gun and releases bombs; normal volume fires the gun, loud sounds release a massive bomb that clears the screen. The other player controls the thrust of the character's jet pack. The sounds the players make are played back to them as the sound effects for their actions.
* * * Requires 2 microphones. * * *
Submitted at Art Institute of Portland (United States)