If you're playing through the NES adaptation of The Hunt for Red October for some reason, you might start thinking to yourself, "Gee, I wish there was some way I could make this game easier". And if you were, today's your lucky day.
First, crash your subs into the landscape until you run out, which sounds counterintuitive, I know. But when you crash your last one, and before the screen tells you "Game Over", pause the game.
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Then while it's paused, grab Controller 1 and press
A, B, Select, Right, Left, Left, Right, Select, B, A, B, B, A
Under normal circumstances, that is your single-use Level Skip code, but since we're out of ships, the circumstances change and instead, you're given a full complement of submarines! How many? Well, the counter rockets up to "I5" if that tells you anything
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Which means you can play this game until you finish it or you're absolutely sick of it. Win-win!