Level 13--Natla's Mines

First Fuse: Swim under the waterfall and pull out. Throw the switch. Swim east to the landing with barrels and crates. Enter the opening to the right and move the crate in the SE corner to reveal another switch. Return behind the waterfall and climb south. Follow the path, jump the chasm, and return to the rail tracks. Follow them through the automatically opening door. To bypass the boulders, walk to the first barricade, watch the boulder pass, turn right, grab the ledge, shimmy left above the gap, pull up, and walk to the end. Do not drop down or move towards the second boulder. Turn right at the end of the path to find the first fuse (1). Use Save Crystal (1).

Go up the incline south. At the end, roll and retreat to avoid a boulder rolling down the ramp to your left. Return to the ramp, stay on the north side for another boulder rolling down the south side. Follow the ramp to a hole in the floor and safety drop back to the hurdles. To clear the exit, move east (towards the entrance) to trigger the second boulder. Pull up north and follow the upper path to a hole to drop through, returning to the original room.

Second Fuse: To the east, move a crate west and then north so it's under the ceiling hole. Use the box to get on top of the shack, then fall through the breakaway tile (1). Follow the path to a switch that moves the boat. Continue to a ramp leading to a hole. Slide backwards through the hole holding forward to safety drop onto the strategically placed crate. Exit east to return to the water. Pass a large Medi pack (2) on the floor. Pull up onto the repositioned boat (from the middle third). Make a running jump over the new area with crates to enter the area behind the crates to the left and grab Magnum clips (3). Move the different-looking crate west once, then north. Move the next crate west twice and south once to reveal another switch that moves the RH-75 out of the way. Swim back to where the RH-75 is (south of your starting position).