Chapter 3
Samus ran thru the stone hallway, blasting the sidehoppers that stood in her way. She climbed the shaft and used a kinetic orb cannon to make her way up to the top. When she came to an acid lake, she used a zip line to get to the other side. As she did so, an acid worm attacked! Samus pounded missiles into its eyes to destroy it. Then she worked her way down to the room where Kraid awaited her.
Kraid was a five story tall lizard with three spike-filled belly buttons and one big fat belly. It roared and fired spikes from its belly buttons. Samus shot it with a missile right between its two lower eyes and right below it's third eye. This caused Kraid to open his mouth. Samus fired several missiles down his gullet. This caused Kraid to destroy the platforms she was standing on. Samus climbed to the top of the room and repeated the process, being careful to monitor her energy reserves and missile supply. She knew she had won when Kraid stopped fighting and sunk into the ground below.
Samus retrieved the Speed Booster from the room with a Chozo statue, then used it to blaze thru to the other side of the lair. After getting a few expansions, she left Kraid's lair and traveled back to Norfair after getting the location of the High Jump Boots from a Chozo statue.
In the middle of the Chozo Ruins in Chozodia, the Pirate mothership landed. This was the flagship of Ridley. The creature had answered the Mother Brain's call. Before she could reach the Brain, Samus would have to beat Ridley.
Ridley
Samus retrieved the Boots from Norfair. With them, she was able to retrieve the Varia Suit. She left Norfair, went up to the upper right corner of Brinstar, and retrieved the Varia suit from a Chozo statue. With it, she would be able to venture into acid and Norfair's superheated regions without taking damage.
Varia Suit