《Resident Evil 9: Requiem》 Pine Creek Underground Passage & Battery Locations

Start from the BSAA camp and go through the double doors leading to Pine Creek Apartments. Use the Pine Creek Apartments key you found earlier to open the main gate. When you see a ladder secured with yellow tape, shoot the tape to lower it. You must then take the ladder down into the Pine Creek Apartments underground passage.

Once down, you'll enter an underground parking lot that's completely flooded. To exit through the main door, you'll need to find two battery items.

Leave the flooded area, go through the next door, and climb down the ladder to reach the sewage treatment facility. Drop down to grab the valve handwheel, then use it to open the nearby large gate. A group of zombies will rush Leon. After dealing with them, turn the valve handwheel all the way to the end to use the gate as a path forward.

Head through the passage into the room. The first battery is on the wall. The door next to it opens a shortcut back to the ladder you came down from. Return directly to the battery gate and insert the battery you just picked up.

Near the battery gate, there's a ladder leading to other parts of the underground parking lot. Here, you'll need to climb and traverse between rusted trucks to reach the final battery. After climbing the first ladder and dropping down, prepare to face a few zombies. Be sure to check the rear of the trucks, as many contain supplies.

The second battery is in the upper-left corner of the room, and there's also a small case containing a new weapon for Leon. From this room, climb the ladder and follow the path over the trucks and containers to return to the battery gate and open the door.

When you exit, you'll find yourself on the other side of the large street pit across from the BSAA Central Camp. Next to the bodies of several BSAA soldiers, you can find the BSAA supply crate key. Approach the pit, and there's a lever on the right. Pulling it will drop construction materials into the pit, forming a bridge that leads straight back to the BSAA camp.

Back at the BSAA Central Camp, use the BSAA supply crate key to open the crate. Inside, you'll find a motorcycle and a repair kit — this repair kit is the item needed to assemble the detonator. You can search for other BSAA supply crates now, but the one at the camp is required for the main story; the rest are optional.