Unlock Nazi Knife
Press [F4] while playing the game to bring up the code entry box and enter "BH87-VJ52-VK5Z-8J4N".
You'll have to complete appropriate achievement to get the allotted gamerscore.
Liberator of France (110) - Inspire the people of France.
The Legend Begins (100) - You completed The Saboteur.
Solid Gold (50) - Complete all gold level perks.
Payback (50) - You blew up "Doppelsieg."
Into the Fire (40) - You reached Paris.
Rescue (40) - You rescued Veronique.
Pole Position (40) - You beat Dierker in the Parisian race.
Weapon Master (35) - Purchase all weapons available in the shops.
Out of the Frying Pan (30) - You escaped from Germany.
Crashlander (30) - You sent the Nazi zeppelin up in flames.
Bridge Buster (30) - You destroyed the train.
Repo Man (30) - You recovered the Aurora.
Buried Secrets (25) - The Resistance was born.
Vive La Resistance (25) - You inspired your first area of Paris.
Gold Medalist (20) - Obtain your first gold perk.
Tourist (15) - Collect all monument postcards.
Saint Honore' (15) - Spend 75,000 contraband.
Demolition Derby (15) - Destroy 50 vehicles.
Top o' the World (15) - Climb to the top of the Eiffel Tower.
Wrecking Crew (15) - Complete 333 ambient freeplay in Paris Area 1.
Unnatural Disaster (15) - Complete 212 ambient freeplay in Paris Area 2.
Walking WMD (15) - Complete 239 ambient freeplay in Paris Area 3.
Fatherland Fighter (15) - Complete 53 ambient freeplay in Saarbrucken.
Coast Guard (15) - Complete 76 ambient freeplay in Le Havre.
Guerilla Warfare (15) - Complete 425 ambient freeplay in the countryside.
Master of Disguise (15) - Complete a story mission with disguise intact.
High Diver (15) - Jump from the Eiffel Tower and survive.
Not On My Watch (15) - Stop the Nazis from executing 40 civilians.
Road Trip (10) - You've arrived in Germany with Jules.
Knockwurst (10) - You bested your opponents in the bar fight.
Pint and a Shag (10) - You got lucky with Skylar.
Fenderbender (10) - You crashed Dierker's car.
No Witnesses (10) - Complete a mission without raising alarm.
Commando (10) - Complete each type of ambient freeplay.
Casanova (10) - Kiss 50 women.
Silver Streak (10) - Obtain your first silver perk.
Hell on Wheels (10) - Complete and win all freeplay races.
Silent Death (10) - Stealth kill 50 or more Nazis.
Northern Command (10) - Inspire the people of Paris Area 1.
Western Command (10) - Inspire the people of Paris Area 2.
Southern Command (10) - Inspire the people of Paris Area 3.
Chain Smoker (5) - Spend a lot of time idling around doing nothing.
First Blood (5) - Complete your first ambient freeplay event.
Pigeon Parfait (5) - Find and play 'Bird Blast.
Trick or Treat (5) - Stealth kill a Nazi General while disguised.