Hard Core
Cheat Codes:
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At the options screen type these codes:
Code Result
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CHANGE - SWITCH TANK
RETURN - SWITCH TANK
ENERGY - INFINITE CRYSTALS
GRAVITY - LOW GRAVITY
HEAVY - HIGH GRAVITY
NORMAL - NORMAL GRAVITY
SKIP1 - SKIP 1 LEVEL
SKIP2 - SKIP 10 LEVELS
EASYKEY - GET THE KEY
DARKNESS - NO LIGHT
BLEAK - HEAVY FOG
MANIC - GO FAST
REFLECT - TANK REFLECTS
RAPID - RAPID FIRE
BOMBS - FIRE BOMBS