Chapter 3: Screw Attack

Take top right door. Run all the way to the right, jump up, and use bombs to go through the ceiling. Continue upward. To the left of the statue, use a bomb in the left wall to go through a small space. Jump out of the water and shoot upward to find an Aeion Tank.

Return through the small space, drop down and go up through the small space to the left. Take the left door. Proceed left 1 more room. Use a bomb to enter the small space and get the Aeion Tank.

Run left, jump all the way up, and go through the door on the right. Damage the metroid you encounter in this room until it flees. Use a bomb to drop through the floor. Then shoot the left wall with a missile to get a Missile Expansion.

Go through the left door. Shoot the left wall to find the next room with the metroid. After it flees, return to the previous room. Destroy the grapple block below and take the door on the right. After defeating the metroid, go right 1 room. Drop down and take the bottom right door. Use bombs to go up and take the door on the left. Here you'll find a Missile Expansion.

Return to the previous room, drop down, and step on the switch. Fall down and move the grapple block to the right. Go through that nearby small space to destroy a grapple block. Return back to the left. Use the spider ball to cross the poison water and find an Energy Tank.

Move the grapple block to the right. Run to the left, drop down, cross the poison water to the right, jump up, and take the elevator. Jump up and go right 2 rooms. After the cutscene, drop all the way down to begin a chase scene. Progress all the way down the room. Once the chase is over, you'll get the Space Jump.

Jump all the way back up and take the top left door. Run to the left, jump up, and take the first door on the left. Fall down into the water, then jump up and destroy the grapple block to go right. Jump all the way up and take the missile door on the right. Shoot the Chozo orb to get the Super Missile.

Take the super missile door on the left. Jump up into the water. Use a super missile to reach a Super Missile Expansion.

Return to the right, jump up, and head through the door on the right. Proceed to the right and use a missile to find a Super Missile Expansion.

Go through the small space on the right to find a metroid. After it flees, return to the previous room. Use a bomb to go through the hidden small space in the floor. Use another bomb to go through the left wall, where you'll find the metroid again. After it flees, go back through the small space to find it for the third time. After defeating it, return through the small space to the left. Use a bomb to go through the small space in the ceiling. Take the left door. Fall down, run to the left, fall down again, and take the first super missile door on the left. Jump up through the small space, run to the left, and use the space jump to reach a Missile Expansion.

Fall straight down and take the door to the left. After the cutscene, defeat the metroid in this room using missiles and the grapple beam. Return to the previous room, jump up, and go through the first path on the right. Drop down through the small space and take the bottom right door. Run to the right, fall all the way down, and go through the super missile door. Proceed left 1 more room. Drop down and take the door on the right. Fall down through the small space, run to the right, fall down again, run to the left, and shoot the left wall to enter the small space. Use bombs to reach the Missile Expansion.

Drop down and run to the right. Use a bomb in the floor to reach a Missile Expansion.

Run to the left and jump up. Run to the right and use bombs in the water to find an Aeion Tank.

Proceed to the right and destroy the grapple block to go through the small space. Jump all the way up and take the door on the left. Continue left 3 more rooms. Drop down and use the elevator. Fall down, run all the way to the left, and destroy the grapple block to enter the small space. Continue through the door on the left. Take the small space in the top left corner. Proceed to the left to find a Missile Expansion.

Fall down to the water and defeat the metroid here. Continue right 2 rooms. Use a bomb in the ceiling to find a Missile Expansion.

Go right 1 room and step on the switch. Drop down and use a bomb to enter the small space. Destroy the grapple block and shoot the wall to find a Super Missile Expansion.

Return to the previous room and shoot the corner to enter another small space. Go through the door on the left and take the elevator. Run all the way to the left and shoot the wall to go through. Drop all the way down and take the left door. Run to the left, proceed upward, and use a bomb in the right wall to find a Missile Expansion.

Break the grapple block to the right. Then return through the left small space. Jump all the way up and take the left door. Defeat the metroid in here. Go left 2 rooms. Fall through the floor to find the Phase Drift.

Use the phase drift to find the Super Missile Expansion in the right wall.

Go through the top right small space. Take the left door. Use the phase drift to go up and take the first door on the right. Jump up and take the elevator. Go up and take the door on the right. Proceed all the way up and go left 2 rooms. Drop down and take the bottom right door. Move the grapple block to the right. Drop down and destroy the grapple block. Jump back up and move the grapple block to the left. Fall down and go through the missile door. Shoot the Chozo orb for the Plasma Beam.

Go through the bottom left door. Climb all the way up and go through the small space in the top right corner. Take the door on the right. Fall all the way down and take the door on the left. Jump up and take the door on the right. Go through the missile door. Shoot the Chozo orb for the Gravity Suit.

Drop through the floor and take the bottom right door. Use a bomb in the bottom right corner to go through a small space. Then use the grapple beam and the phase drift to get the Missile Expansion.

Go through the top left door. Take the top right small space and go left 2 rooms to find a Super Missile Expansion.

Fall down and use a bomb in the right wall to find a Missile Expansion.

Drop down and take the elevator. Take the left door. Fall all the way down and run all the way left. Use the grapple beam to drop down and find a Super Missile Expansion.

Jump up the right side of the room. Use a bomb in the left wall to find a Missile Expansion.

Go through the super missile door to the right. Take the small space to the left. Use the grapple beam to reach an Energy Tank.

Use the grapple beam to take the top left door. Run all the way to the right and take the right door. Proceed right 1 more room and defeat the metroid in this room. Go left 2 rooms. Run to the left, fall down, and take the plasma beam door on the left. Use a bomb to go through the top left small space. Take the top right door. Go through the missile door. Shoot the Chozo orb for the Screw Attack.