Wipeout 64

Unlimited time:
Hold Z + L + R and hit C-Up, C-Right, C-Left, C-Down, C-Up,
C-Right, C-Left, C-Down during the gameplay.

Unlimited ammunition:
Hold Z + L + R and hit C-Down, C-Down, C-Left, C-Left, C-Right,
C-Right, C-Up during the gameplay.

Unlimited energy:
Hold Z + L + R and hit C-Up, C-Down, C-Left, C-Right, C-Up,
C-Down, C-Left, C-Right - during the gameplay.

Unlock Velocitar track
Go to the main menu and hit the following button combination:
Hold Z + L + R and hit C-Left, C-Right, C-Up, C-Right, C-Left.

All ships available:
Go to the main menu and hit the following button combination:
Hold Z + L + R and hit C-Down(4 times), C-Right, C-Up, C-Left.

Cyclone weapons power-up (2x damage):
Go to the main menu and hit the following button combination:
Hold Z + L + R and hit C-Left, C-Right, C-Down, C-Left, C-Right,
C-Down, C-Up.

Unlock Super-combo challenge mode:
Finish all 3 challenge modes.

Unlock Piranha II ship:
Finish time challenge mode and reach 1st, 2nd or 3rd place.

Unlock Velocitar track:
Finish the race mode and reach 1st, 2nd or 3rd place.

Cyclone weapons power-up:
Finish the weapons challenge mode and reach 1st, 2nd or 3rd place.