SUB-SCAN
• BUG: Occasionally one of the bottom subs will appear to be a normal sub, but will actually be a bonus sub. {Scott Stilphen}
• BUG: If you turn the game on and leave it in attract mode, the game will register every time a sub is hit. If you leave the game on long enough, the score counter will roll.
• FRYING: Get a screen with no zeros appearing in the score counters, with your ship in pieces. Start the game with the FIRE button. If the lower-right counter under the sonar appears garbled, then the trick will work. Hit the first bonus sub and you'll jump to level 8. Sometimes the game may begin with the subs moving fast. {Scott Stilphen}
