Unlimited ammunition BADCOPSHOW
Rapid fire ICOSIDODEC
Reflecting shots GOBLUE
Multiplay power-ups DENNISMODE
Wire frame mode TRACERON
American movie mode SPRECHEN
Captain Dye mode CAPTAINDYE
Audie Murphy mode MOSTMEDALS
Staff pic DWIGALLERY
Development team pic DWIMOHTEAM
Adrian Jones pic AJRULES
Lynn Henson pic COOLCHICK
Boat level DASBOOT

Multiplayer characters:
Winston Churchill FINESTHOUR
Velociraptor SSPIELBERG
William Shakespeare PAYBACK
Bismark The Dog WOOFWOOF
Werner Von Braun ROCKETMAN
Wolfgang HOODUP
Noah BEACHBALL
Otto HERRZOMBIE
Kurt and Rosi SMPSMDMILK
Felix HOODDOWN
Evil Colonel Muller BIGFATMAN
Gunther GUNTHER

Unlock "Making of..." feature:
Level 1 INVASION
Level 2 BIGGRETA
Level 3 DASBOOT
Level 4 STUKA
Level 5 KOMET
Level 6 TWOSIXTWO
Level 7 MISSLEAGUE
Level 8 VICTORYDAY

Kill Yourself:
Press R1, R2, L2, R1, R1, R1, R2, L2, L1, L1 then press Square quickly. Your player should blow up and say, "What did you do that for?"

Hints:
Take careful aim and go for head shots when you can.
Don't forget that grenades can do the trick when firearms can't.
A stealthy approach is best. Remember, you have a huge advantage if you see the enemy first.