Use JASON to collect any goodies below, and to destroy the mines near the bottom of the level. Have JASON enter the small area at the center of the level. Use JASON to shoot through the gaps and hit the octopus arms. While the octopus arms are inactive, quickly move Nick's submarine upwards towards the exit. Be sure not to let JASON's battery die. Position Nick's sub directly above the barrel that contains the key, and then use JASON to destroy the barrel. As Nick, go to the exit. JASON cannot exit the level with Nick.