The Elder Scrolls 5: Skyrim re...
	Various Trophies...
	Wolfenstein 3D references...
	Wolfenstein 3D secret level...

During the "Prologue" level you can find a Dragonborn helm from The Elder Scrolls 5: Skyrim sitting on some boxes in a storage area.

Complete the following tasks to unlock PlayStation 4 trophy rewards.

Trophy	How to unlock
All that glitters (Bronze)	Collect 8 gold items.
Ammunition upgrade (Bronze)	Unlock the Ammunition upgrade perk.
Annette saved (Bronze)	Choose to save Annette.
Armor upgrade I (Bronze)	Unlock the Armor upgrade I perk.
Armor upgrade II (Bronze)	Unlock the Armor upgrade II perk.
Bathhouse combat master (Bronze)	Achieve gold medal for this challenge map.
Bombenschuss clip upgrade (Bronze)	Unlock the Bombenschuss clip upgrade perk.
Cable car platform combat master (Bronze)	Achieve gold medal for this challenge map.
Carry heavy machinegun (Bronze)	Unlock the Carry heavy machinegun perk.
Caves combat master (Bronze)	Achieve gold medal for this challenge map.
Die, Grösse, die! (Gold)	Complete all nightmare levels.
Docks nightmare (Bronze)	Complete the nightmare in chapter 2.
Eagle Eye (Bronze)	Unlock the Eagle Eye perk.
Escape! nightmare (Bronze)	Complete the nightmare in chapter 4.
Freedom (Bronze)	Escape Castle Wolfenstein.
German Alps nightmare (Bronze)	Complete the prologue nightmare.
Glittering gold (Bronze)	Collect 16 gold items.
Gold master (Gold)	Collect 64 gold items.
Graveyard combat master (Bronze)	Achieve gold medal for this challenge map.
Grenade belt (Bronze)	Unlock the Grenade belt perk.
Guten tag! (Silver)	Complete the nightmare boss level.
Health upgrade I (Bronze)	Unlock the Health upgrade I perk.
Health upgrade II (Bronze)	Unlock the Health upgrade II perk.
Health upgrade III (Bronze)	Unlock the Health upgrade III perk.
Hero (Silver)	Complete game on any difficulty.
Kampfpistole ammo storage upgrade (Bronze)	Unlock the Kampfpistole ammo storage upgrade perk.
Keep foyer combat master (Bronze)	Achieve gold medal for this challenge map.
Kessler saved (Bronze)	Choose to save Kessler.
Old town nightmare (Bronze)	Complete the nightmare in chapter 7.
Paderborn bridge combat master (Bronze)	Achieve gold medal for this challenge map.
Paperboy (Bronze)	Collect 5 letters.
Postman (Gold)	Collect all letters.
Prison docks combat master (Bronze)	Achieve gold medal for this challenge map.
Prison nightmare (Bronze)	Complete the nightmare in chapter 1.
Quick turn (Bronze)	Unlock the Quick turn perk.
Reload mash (Bronze)	Unlock the Reload mash perk.
Research centre combat master (Bronze)	Achieve gold medal for this challenge map.
Revenge (Silver)	Complete part one.
Ruins nightmare (Bronze)	Complete the nightmare in chapter 6.
Schockhammer clip upgrade (Bronze)	Unlock the Schockhammer clip upgrade perk.
Super hero (Silver)	Complete game on I AM DEATH INCARNATE! (or ÜBER).
The Old Blood master (Platinum)	Collect all trophies.
The ecstasy of gold (Bronze)	Collect 32 gold items.
Tough Skin (Bronze)	Unlock the Tough Skin perk.
Undercover (Bronze)	Infiltrate Castle Wolfenstein.
Vampire (Bronze)	Unlock the Vampire perk.
Wolfenstein Keep nightmare (Bronze)	Complete the nightmare in chapter 3.
Workshop combat master (Bronze)	Achieve gold medal for this challenge map.
Wulfburg nightmare (Bronze)	Complete the nightmare in chapter 5.
Wulfburg square combat master (Bronze)	Achieve gold medal for this challenge map.
Über hero (Silver)	Complete game on ÜBER.

All nine chapters from the "Episode 1: Escape from Wolfenstein" part of Wolfenstein 3D are hidden in the nine Nightmare levels in "Wolfenstein: The Old Blood". In each Wolfenstein: The Old Blood chapter, search for a secret room with an empty bed, a light, and a Wolfenstein 3D poster. Walk up to the pillow on the bed to display a "Nightmare" message. Hold [Action] to activate the bonus level, which is that level from the classic Wolfenstein 3D. After dying in the bonus level, you will wake up again in the bedroom you started the bonus level from. You can replay any Nightmare level. As soon as you wake up from a Nightmare, you will be able to go back to bed and enter the Nightmare again.

During the "Prologue" level you can find a poster featuring a scene from Wolfenstein 3D.

Start the first Nightmare level from Wolfenstein 3D. Go to the end of floor 1 to a room where the floor 2 elevator is located. Turn right and search the wall to find a hidden room. Search the walls inside the secret room to an elevator that can be used to reach secret level 10, "Floor 10".