This game was developed and published by Interphase Technologies, a one-man operation, with all of the games being designed and programmed by Steve (Stephen) Willey from his home near Vancouver, Canada. In Japan it was published by Toshiba-EMI Ltd. for the MSX.
The story like found in the manual: "Sam is waiting at Cental Park for his grilfriend Sally. There she is! He rushes to greet her and the next thing he knows, he's scrambling around the sewers of New York. But three Russian submarines have been detected in the city's sewers and the system has been blocked off. The only way Sam can get out is to sink all 3 subs. He will try his best, but he only has a revolver and three lives. So he's going to need a lot of help from you!"