Found Harry's cupboard and Indiana Jones in Dying Light: The Following. The Harry easteregg can be found in a remote house left of the big lake. The other one I forgot :
Dying Light - Crafting and Blueprints Guide | Accelerated Ideas
Comunità di Steam :: Guida :: NEW SECRET PROJECT " STROBOLIERE "
Dying Light Blueprints: Where to Find Them? - TWIFT
Dying Light - Strobe Knight Blueprint - YouTube
Where To Find All Blueprints In Dying Light
Dying Light on Twitter: "The military machete was your favorite. Time to pick a mod. REPLY with a mod. See it in action next week. http://t.co/dVM102KuDc" / Twitter
Dying Light Slums and Old Town Blueprint Locations – The Undead Zone
Old Town | Blueprints - Dying Light Game Guide | gamepressure.com
Clicker | Dying Light Wiki | Fandom
Strobe Knight | Dying Light Wiki | Fandom
Dying Light - Locations of ALL Legendary Blueprints | Alienware Arena
Dying Light - How To Find Blueprint "Strobe Knight" (Old Town) - YouTube