Top Gear Rally 2 

No damage or failures 
At the title screen, press L, Z, Start, Up(2).

100,000 sponsor credits in support van 
At the title screen, press L, Z, Start, L(2).

Max championship points in support van 
At the title screen, press L, C-Up, Left, L(2).

Speed-based aspect ratio 
At the title screen, press Z, C-Left, L, Up, Right.

Speed warp view 
At the title screen, press Z, C-Left, R, Up, Right.

Fat world 
At the title screen, press Z, C-Right, L, Up, Right.

Thin world 
At the title screen, press Z, C-Right, R, Up, Right.

Upside down world 
At the title screen, press C-Up, Z, Start, Up, Down.

Volcano valley world 
At the title screen, press C-Left, Z, R, L, Down.

Bouncy cars 
At the title screen, press C-Up, C-Left, R, Up, Left.

Large tire 
At the title screen, press C-Left, Z, R, Down(2).

Wobbly tire 
At the title screen, press R, C-Right, Start, Down, Z.

Hi-rez mode 
At the title screen, press C-Left(2), Left, L(2).
Note: This code requires the 4MB RAM expansion pak.

Repair power 
At the race description screen, press L, Z, R, L, Start.