Chapter 4: Finale

Return to the room that had the Zeta Metroid. Then go right 1 room. Fall all the way down. Jump onto the ledge on the right that has the spikes on it. Use a bomb in the bottom right corner to find a Missile Expansion.

Use the screw attack to go up 1 room and find a Gamma Metroid.

Fall down into the room below. Continue downward and enter the first room on the right. Go right 1 more room. Shoot through the sand to find a Zeta Metroid.

Head left 2 rooms. Fall all the way down and go right 2 rooms. Continue down and enter the room on the right. Progress all the way to the bottom and enter the door on the left. Go left 1 more room. Fall all the way to the bottom and go left 2 rooms. Head left and then go up and enter the room on the right. Continue right 1 more room. Jump up and enter the room on the left. Go up and enter the room on the left. Run to the left to find an Alpha Metroid.

Go left 1 room. Fall down and enter the room on the right. Progress downward and enter the room on the right. Continue right 2 more rooms. Go up and enter the room on the left. Proceed upward and enter the room on the left. Run to the left to find an Omega Metroid. These are bigger forms of the Zeta Metroids, so use missiles to damage them.

Go left 1 room. Fall down and enter the room on the right. Progress downward and enter the room on the right. Drop all the way down and enter the door on the left. Drop all the way down and go left 2 rooms. Head all the way up and enter the room on the left. Continue all the way up and go left 1 room. Jump up and enter the first room on the right. Proceed all the way up and enter the room on the left. Continue to the left until you find an Omega Metroid.

Head right 2 rooms. Fall down and enter the first room on the right. Continue right 1 room. Fall all the way down and go right 1 room. Drop all the way down and enter the room on the left. Continue left 1 more room to find an Omega Metroid.

Go right 2 rooms. Jump up and enter the first door on the right. Continue right to find another Omega Metroid.

Return left 2 rooms. Go all the way up and head left 1 room. Jump up and enter the first room on the left. Head left and fall through the gap in the middle of the floor. Fall all the way down and enter the room on the right. Progress all the way up and enter the room on the left. Continue through 1 more door on the left. Head up and jump on the first ledge with no lava. Enter the room on the right. Continue through another door on the right. Head up and enter the first door on the left. Continue through another door on the left.

Jump up onto the first ledge with no lava. Head right 1 room. Near the save station, jump through the hidden gap in the ceiling to enter the room above. Climb all the way up the right wall, cross the ceiling to the left, and up the gap in the wall into the room above. Here you'll find an Energy and Missile Recharge station. Climb down the left side of the gap in the wall, continue left along the ceiling in the next room, and up the next gap in the ceiling to enter another room above. Go all the way up to enter the room above. Shoot the Chozo Orb in the top left corner to get the Ice Beam.

Fall down into the room below. Use the spider ball to climb down the left side of the gap in the floor into the room below. Climb left across the ceiling and up the next gap into another room above. Go all the way up and enter the room on the left. Continue upward and enter the room above. 8 Metroids will be added to the counter. In this area, Metroids can be destroyed with a combination of the Ice Beam and Missiles. Proceed to the right and fall into the room below. Here you'll find the first Metroid.

Head right 1 room to find another Metroid.

Go all the way up and enter the room on the right to find the next Metroid.

Continue upward to find another Metroid.

Go up all the way and enter the room on the left. Here you'll find the next Metroid.

Proceed to the left to find another Metroid.

Go left 1 room to find a Metroid.

Continue downward to find the last Metroid.

Proceed downward and enter the room on the right. Head all the way to the right and fall through the floor in the bottom right corner to find the Queen Metroid. To damage her, wait for her to open her mouth, shoot a missile in her mouth and then use the morph ball to go into her belly and then use a bomb.

After the Queen Metroid is destroyed, go left 1 room to find the baby Metroid. Proceed to the left and all the way up the room. Once you're on the surface, head right and use the space jump to go all the way up the right wall. Once you're on the ledge, continue to the right and fall all the way down to reach Samus's ship, ending the game.