Boarder Zone - Platform: Gameboy Color

Challenge mode tracks
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Enter 290771 as a password to unlock tracks 
4 and 5 in challenge mode.

Time attack tracks
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Enter 131095 as a password to unlock track 4 in 
time attack mode. 

Slalom tracks
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Enter 310169 as a password to unlock track 5 in 
slalom mode. 

Bonus track
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Enter 020971 as a password to unlock a bonus track under 
challenge mode under the time option. 
This code is revealed after race attack mode is completed.