A Chance meeting: Kill Nazis with a falling object
When you enter the main U-boat facility and start to fight your way towards the docks, you will encounter several train cars. One of these cars has a mounted MG-44. Hit the switch on the other side of the car and it will roll until the gun is pointing through a doorway leading into an open area between the dockyard buildings. Use the gun to clear out the enemy. When done, proceed forward until you find more Nazis. One of them will shoot at you with another machine gun mounted on a sandbagged position. Behind that are a truck full of torpedoes and a crane that is holding several crates aloft. Use your Springfield sniper rifle and shoot the rope. The crates will fall on the truck, causing it to explode and kill the sniper on the crane and any nearby Nazis.
Bullet Shield
Select Passwords from the Options menu and enter REFLECTOR. Green lights confirm correct code entery. Turn on this cheat on the Bonus screen.
Complete current mission with a gold star
Enter SEAGULL at the Enigma Machine. Green lights will confirm correct code entry. Select the "Bonus" option underneath the Enigma Machine to enable/disable this cheat.
Get Mission 2
Go to the Enigma machine and put in EAGLE for a code. A green light will signal correct entry. Now go to Bonus under the Enigma machine to toggle cheat on/off.
Gold Medal
To get gold at the end of a level have 75% or more health and kill 95% or more of the enemy.
Mision 5
Enter DOVE at the Enigma Machine. Green lights will confirm correct code entry. Select the "Bonus" option underneath the Enigma Machine to enable/disable this cheat.
Mission 3
Enter HAWK at the Enigma Machine. Green lights will confirm correct code entry. Select the "Bonus" option underneath the Enigma Machine to enable/disable this cheat.
Restore a bit of health
In some levels, such as Yard To Yard, you can find bread on tables that you can eat and get back a small amount of health.
Rubber Grenade mode
Enter BOUNCE at the Enigma Machine. Green lights will confirm correct code entry. Select the "Bonus" option underneath the Enigma Machine to enable/disable this cheat.
Secret in the golden lion
when you get to the golden lion in needle in a haystack tip the piano player but dont go upstairs. go behind the bar wall where the bartender stands then go to the door where the guards stand next to then press sqaure. the guard will tap dance and the the guy who shouts out drink over here will go bananas.
Silver Bullet mode
Enter SILVERSHOT at the Enigma Machine. Green lights will confirm correct code entry. Select the "Bonus" option underneath the Enigma Machine to enable/disable this cheat. Silver bullet mode allows enemies to be killed with one shot.
Sniper Mode
Enter SUPERSHOT at the Enigma Machine. Green lights will confirm correct code entry. Select the "Bonus" option underneath the Enigma Machine to enable/disable this cheat. This cheat allows all guns to zoom like a sniper rifle.
Unlock everything
Go to options the go to passwords and enter "ballowax" and press enter the lights should flash green and everything will be unlocked including levels medals and cheats.
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.