Areas where you can find the blueprints
Natural Medkit � The blueprint is inside one of the huts in the fishermen's village.
Stinky Edge � The blueprint is in one of the rooms on the inn's upper level.
Home Run and Zombie Classic � The blueprint is in a building next to the antenna and you can get to it while completing the "Prodigal Son" side mission. After doing this mission we will be able to receive the second blueprint.
Excalibur � On a small island we will find a secret sword which is embedded in the zombie and in the rock. After pulling it out (press the F key) and waiting for a few moments, the body will disappears and will shows us the blueprint of the Exaclibur sword.
Surprise MFs � The blueprint is at the top of a high tower standing on the side of the bridge (near the coast).
Machete � The blueprint is inside the toolbox more or less in the center of the building roof between blue barrels. It is treated as an easter egg. As a result you must interact with the box a few dozen times in order to open it.
Thorn Crown � The blueprint is in a small box lying on the table inside the middle building (generally there are three houses).
Puke'N'Nuke � The blueprint is inside the chest located at the end of a mountainous switchback at the foot of the hill.
Airport Security � The blueprint is in a little house beside the lake.
Bad Hangover � The blueprint is on a school desk in one of the classrooms. We can get here during the mission called "Siblings" or the mission called "Cease and Desist".
Barbershop � The blueprint is on the shelf in the room upstairs.
Dahlia's Potions � All the plans we will receive after doing a lot of missions for Dahlia.
Electrician � We will receive the blueprint after doing the mission called "Electronic Parts".
Exorcist � We will receive the blueprint after escorting the survivor to the safezone.
Filthy Blade � The blueprint is on the shelf in a little building.
Fire Launcher � We will receive the blueprint after escorting the survivor to the safezone.
Glowing Stick � The blueprint is on the driver's seat in the bus.
Grill�em and Kill�em � We will receive the blueprint after doing the mission called "Lighter Gas".
GTFO � We will receive the blueprint after escorting the survivor to the safezone.
Kurts Bombs � We will receive the blueprint after doing the mission called "The Big Bang Thesis".
Puff Puff Pass � We will receive the blueprint after escorting the survivor to the safezone.
Short Ciruit � The blueprint is in the toolbox standing on the ground.
SiCK Bomb � We will receive the blueprint after playing checkers game. For every turn we have to leave the towerzone completely.
Zappo � We will receive the blueprint after escorting the survivor to the safezone.
Heavy Welder � The blueprint is in the chest standing behind a little house which is located next to the lake.
Zazhigalka � The blueprint is on a roof of a trailer where doctor Zere is performing his studies.
230V � The blueprint is inside a small building in the safezone.
Water Current � The blueprint is inside the power distribution building.
Stay Down � The blueprint is inside one of the buildings in the safezone.
Pocket Lighter � The blueprint is inside the drug store.
Dentist � The blueprint is on a desk inside the tent.
Poison Pen � The blueprint is attached to a board.
Electricutter � The blueprint is inside the eastern substation building.
Welder � The blueprint is inside Jaffar's Wheelstation building.
Spiked Collar � The blueprint is in the fishermen's village.
Cattle Stamp � The blueprint is inside one of the buildings next to the ferry.
Tru-Action Electric Baseball � The blueprint is inside a yellow box in the warehouse.