Unlock Silver Bullet Mode:
At the Password screen enter KILLERSHOT.
Unlock the Making of Mission 2:
At the Password screen enter XTRASCENET.
Unlock the Making of Mission 1:
At the Password screen enter XTRASCENEO.
Mission 4:
Enter "PIKE" at the Enigma Machine to unlock the Several Bridges Too Far mission.
Note: If you entered the code correctly, green lights will flash.
Unlock Pefectionist Mode:
At the Password screen enter ONEPMPCHMP.
Unlock Men with Hats:
At the Password screen enter MERCER.
Unlock the full bonus menu:
Type in ''Enchilada'' in the password section of the options screen.
Unlock the Making of Mission 5:
At the Password screen enter XTRASCENEI.
Unlock the Making of Mission 6:
At the Password screen enter XTRASCENES.
Bullet shield Mode:
Enter "NOHITSFORU" at the Enigma Machine. Select the "Bonus" option underneath the Enigma Machine to enable/disable this cheat. All bullets that are fired at you will be ineffective and will not damage you.
Note: If you entered the code correctly, green lights will flash.
Unlock Achilles Mode:
At the Password screen enter TODADOME.
Unlock the Making of Mission 3:
At the Password screen enter XTRASCENER.
Unlock M.O.H.ton Torpedo:
At the Password screen enter TONSOFUN.
Unlock Sniper Mode:
At the Password screen enter LONGVIEW.
Unlock Rubber Grenades:
At the Password screen enter ELASTIC.
Mission 3:
Enter "STURGEON" at the Enigma Machine to unlock the Needle In A Haystack mission.
Note: If you entered the code correctly, green lights will flash.
Unlock the Making of Mission 4:
At the Password screen enter XTRASCENEF.
Unlock Invisible Enemies:
At the Password screen enter GHOSTSHOTS.
Invincibility:
Pause gameplay and press X, L, B, R, Back, Y, X.
Get Horten's Nest Mission 6:
Go to the Enigma machine and put in CATFISH for a code. Now go to Bonus under the Enigma machine to toggle cheat on/off.
Note: A green light will signal correct entry.
Get A Storm in the Port Mission 2:
Go to the Enigma machine and put in BASS for a code. Now go to Bonus under the Enigma machine to toggle cheat on/off.
Note: A green light will signal correct entry.
Get Rolling Thunder Mission 5:
Go to the Enigma machine and put in TROUT for a code. Now go to Bonus under the Enigma machine to toggle cheat on/off.
Note: A green light will signal correct entry.
Finish previous Mission With Gold Star:
Go to the Enigma machine and put in SALMON for a code. Now go to Bonus under the Enigma machine to toggle cheat on/off.
Note: A green light will signal correct entry.