Achieve gold medal for this challenge map
Choose to save Kessler
Unlock the Armor upgrade I perk
Choose to save Annette
Unlock the Grenade belt perk
Collect all letters
Unlock the Tough Skin perk
Escape Castle Wolfenstein
Unlock the Eagle Eye perk
Complete the nightmare in chapter 3
Complete the nightmare in chapter 7
Complete the nightmare boss level
Unlock the Reload mash perk
Unlock the Ammunition upgrade perk
Collect 64 gold items
Unlock the Kampfpistole ammo storage upgrade perk
Complete the prologue nightmare
Collect 8 gold items
Unlock the Health upgrade II perk
Collect 16 gold items
Unlock the Schockhammer clip upgrade perk
Infiltrate Castle Wolfenstein
Complete the nightmare in chapter 2
Complete the nightmare in chapter 4
Complete game on any difficulty
Unlock the Health upgrade I perk
Complete the nightmare in chapter 6
Unlock the Quick turn perk
Unlock the Vampire perk
Complete game on I AM DEATH INCARNATE! (or ÜBER)
Unlock the Carry heavy machinegun perk
Collect 5 letters
Collect 32 gold items
Complete the nightmare in chapter 1
Complete the nightmare in chapter 5
Complete game on ÜBER
Unlock the Armor upgrade II perk
Complete all nightmare levels
Unlock the Health upgrade III perk
Complete part one
Unlock the Bombenschuss clip upgrade perk