The Blundergat is one of the powerful Wonder Weapons available in Paradox Junction. To craft it, you'll need to collect four separate components hidden throughout both the pre-nuked and destroyed versions of Nuketown. Once you've gathered all the parts, you can assemble the weapon at the truck located in the centre of the map.

Step 1: Collect the Sealant

Switch to the pre-nuked version of the map and head upstairs inside the yellow house. Search the bookshelf and collect the Sealant from the bottom shelf.

Step 2: Obtain the Barrel

Locate the yellow cyst that produces a deep humming noise. Kill zombies in the area around it until the Barrel component drops. Pick it up and move on to the next step.

Step 3: Create the Vial Component

Head upstairs in the yellow house and collect the empty vial from a desk.

Take the vial to the kitchen area of the greenhouse and interact with the sink to fill it with the bubbling acid.

Once filled, return to the pre-nuked version of Nuketown and pour the acid onto the humming mannequin.

After the mannequin has dissolved, travel back to the destroyed version of the map and collect the component left behind.

Step 4: Retrieve the Stock

Travel to the destroyed version of Nuketown and listen for a faint humming sound coming from a marked section of wall. Throw an explosive at the wall to reveal a hidden opening.

Return to the opening you created earlier by blowing up the wall. Use the teleporter found there to access a hidden area containing the Stock. Pick it up to complete the set of parts.

Step 5: Craft the Blundergat

With all four components collected, travel to the destroyed version of Nuketown and locate the red truck in the centre of the map.

Open the rear door, melee the crafting bench inside, and assemble the Blundergat.

Once crafted, you'll have access to one of the most devastating weapons available in Paradox Junction, making it much easier to deal with large zombie hordes and tougher enemies.