- Start With 50 Deck Gun Shells
ZLEPOIAI - Start With 99 Deck Gun Shells
LTEPOIAI - Infinite Deck Gun Shells
SZXVOPVG - Infinite Bow Torpedoes
SZSVUPVG - Infinite Aft Torpedoes
SXETUPVG - Increases Max Submerged Speed From 10 To 29
YXVPUYGP - Increases Max Surfaced Speed From 20 To 50
GUSOXNTO - Infinite Battery Power
SZSPKLVG - Don’t Sink From Depth Charges (Your Sub Can Still Be Damaged, But You Won’t Sink)
SXOPUGSA
Silent Service - Game Genie Codes
The following are known Game Genie Codes for Silent Service on Nintendo Entertainment System (NES).