Na Pali Haven

Go up the stairs out into the open and kill a couple of Krall patrolling the streets. A small door leads to a grassy area overlooking a lake containing an underwater tunnel and a large obelisk. Enter the only open building, the barn, to the left is a small room with a lever that opens a door to the right, go through it and notice the alien cows and the hay lift suspended by a rope. Turn a wheel mounted on the wall to open a door leading out back. Destroy the barrels to collect Nali Healing Seeds, then enter the open door, kill the Krall inside and go upstairs and throw a lever.

Return to the outdoor area, go up the ramp and through the door, inside is a passage leading to the upper floor of the barn. Walk around the balcony into a small room, kill the Krall in there and take another door leading to a smaller balcony, press the lever to drop the hay lift. It crashes to the floor, creating a hole. Drop down through the hole, downstairs is a cracked wall with explosive barrels near, shoot the barrels to break a hole in the wall. Proceed through the wall into a dark cellar. Kill all the pupae and then go upstairs to a room with Skaarj, kill them and run up a second flight of stairs.

Kill another Skaarj upstairs and find the winch, activate it to open the gate blocking the towns main street.

Go into the new part of town and follow the main street, eventually it leads to stairs leading down to water. Go down the stairs. A pair of short circular water filed tunnels form a figure eight. Kill the Tentacles on the ceiling and devilfish in the water and look for a wall with a crack above the water line. Shoot the crack until a hole appears. Go through into a room with a Skaarj and filled with huge kegs containing pupae. Go through a door to a short corridor and a ramp upstairs to an inn, kill the Krall and press a button behind the bar to open a door leading upstairs. There are several bedrooms upstairs with sleeping Skaarj, kill them and collect the equipment, including Scuba gear, find and press the lever in one of the rooms, break the window and jump outside to the back of the inn. A door leads to a small room, press the lever to open another door in the outdoor area.

Behind the new door is another small room with a Skaarj and a door leading to the high-tech control room. Enter the room and press a wall console to summon a lift, go upstairs and find the big computer console. Press it, the message reads "Mountain Base Underwater Entrance Door Controls". Go back outside, jump into the lake and swim into the tunnel until the new level loads.