Below is a walkthrough for A Berry Good Jam Chapter 3 quest in Eastward.
Visit the Hillman’s Ranch
Head downstairs to trigger a quick dialog event. When it concludes, make your way to the subway on Princess Avenue and take the train to the “Big” Station. Head north into the City Outskirts then take a right heading east through the next area. Follow the lake north to reach an area with zombies surrounded by tombstones. If you head to the northern wall and drop a bomb, that will blow a hole in the wall. Head through and fight off the four zombies inside. You’ll then be able to loot a chest containing an advanced gear part.
Exit the cave and keep heading west passing through a small rundown village. If you enter the abandoned house on the left, you’ll get an advanced gear part from a chest in the back left room behind all of the bramble. In the next area past the village, you’ll come to an area with two bamboo gates and a switch on both sides. Separate John and Sam then put one of them on the nearby switch to lower one of the gates. Move the other to the switch on the other side then switch back to the other to reach the other side. Proceed to the next area to find Hillman triggering a dialog event ending with you receiving the Glazy Berry.
Return to Rocket Mansion
Head back to the train station and use the train to return to New Dam City then return to Rocket Mansion for a dialog event.
Click here for thee A Big Dam Plan quest guide!