Unlock mission 4 and 6:
To unlock mission 4 you go to the enigma machine and type in PARROT. To unlock mission 6, type in TOUCAN.
Get Mission 2:
Go to the Enigma machine and put in EAGLE for a code. Now go to Bonus under the Enigma machine to toggle cheat on/off.
Note: A green light will signal correct entry.
Head Mode:
Enter HEADSUP at the Enigma Machine. Select the "Bonus" option underneath the Enigma Machine to enable/disable this cheat. Nazi's can only be killed with a headshot when this cheat is active.
Note: Green lights will confirm correct code entry.
Mission 5:
Enter DOVE at the Enigma Machine. Select the "Bonus" option underneath the Enigma Machine to enable/disable this cheat.
Note: Green lights will confirm correct code entry.
Mission 3:
Enter HAWK at the Enigma Machine. Select the "Bonus" option underneath the Enigma Machine to enable/disable this cheat.
Note: Green lights will confirm correct code entry.
Sniper Mode:
Enter SUPERSHOT at the Enigma Machine. Select the "Bonus" option underneath the Enigma Machine to enable/disable this cheat. This cheat allows all guns to zoom like a sniper rifle.
Note: Green lights will confirm correct code entry.
Rubber Grenade Mode:
Enter BOUNCE at the Enigma Machine. Select the "Bonus" option underneath the Enigma Machine to enable/disable this cheat.
Note: Green lights will confirm correct code entry.
Silver Bullet Mode:
Enter SILVERSHOT at the Enigma Machine. Select the "Bonus" option underneath the Enigma Machine to enable/disable this cheat. Silver bullet mode allows enemies to be killed with one shot.
Note: Green lights will confirm correct code entry.