CheatCodes.com has all the official 1942 Game Boy cheats to unlock everything. If you know of any that we don't have, please let us know.
All published and official codes as of Sunday May 26, 2013 for 1942 are shown below.
Level 4- medal, medal, your plane, enemy plane. Level 8- your plane, enemy plane, enemy plane, medal. Level 12- bullet, enemy plane, your plane, your plane Level 16- enemy plane, enemy plane, bullet, enemy plane. Level 20- your plane, medal, bullet, your plane. Level 24- bullet, your plane, medal, medal, Level 28- medal, enemy plane, medal, enemy plane.
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