GameHacking.org | 688 Attack Sub (USA, Europe)

Languages	Size	CRC32	Region	Serial
English	1M	F2C58BF7	USA, Europe	No

Master Codes

Master code (improved) by Tony Hedstrom Game Genie EJCT-AA24

Enemies can't see you or detect you when you surface, as long as your periscope is down. by Tony Hedstrom Game Genie AMMA-AA3Y
Infinite missiles, torpedoes, and noisemakers by Tony Hedstrom Game Genie ALGA-AA94
No cavitation by Tony Hedstrom Game Genie NWBT-AA62
Unlimited speed. See notes. by Tony Hedstrom Game Genie ADJT-AA72