TNN Motorsports HardCore Heat - Platform: Dreamcast

LE-2001 truck:
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Press Y, X, Right, Left, Right, Left, Down, Down, Up, Up 
at the mode selection screen. Alternately, successfully 
complete expert mode in first place using the Coyote. 

T4 fighter jet:
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Press Left, Right, Down, X(4) at the mode selection 
screen. Alternately, achieve 100% on the level checker 
when building your car. 

Additional colors:
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Press Down, Left, Up, Right, X, Y, L, R at the mode 
selection screen to unlock a fourth color set. 
Alternately, successfully complete expert mode. 

Random weather in time attack mode:
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Press R, X(7), Y(7) at the mode selection screen. 

Super expert mode:
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Press Left, Left, Right, Right, Left, Right, X, Y(8) 
at the mode selection screen. Alternately, successfully 
complete expert mode under the championship difficulty 
using the Beelzebub Buggy. 

Beelzebub Buggy:
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Successfully complete expert mode in first place.