Enemy Zero Life
Get a high score and enter the initials KEY. This unlocks the Extra Difficulty Level and also a level where enemies are defeated after a single hit.
Code Effect KEY Enemy Zero Life
Extra Difficulty Level, Faster on NTSC
Complete the game on Normal or Hard level. Now there's an EXTRA level available, as well as a NO WAIT FOR NTSC option which makes the game run proportionally faster on NTSC (US/Japanese) consoles.
Unlockable How to Unlock Extra Difficulty Level, Faster on NTSC Complete the game on Normal or Hard
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