Unlock Cyclops:
At the Config menu choose Voice. Play the following numbers to unlock
Cyclops for purchase: 5, 60, 66, 60, 11, 60, 25, 60, 60.
Unlock Diablo Tiger:
At the Config menu choose Voice. Play the following numbers to unlock Diablo Tiger for purchase: 2, 37, 2, 36, 2, 38, 2.
Unlock Diablo Beta:
At the Config menu choose Voice. Play the following numbers to unlock Diablo Beta for purchase: 89, 17, 8, 29, 31, 58, 93, 81