The Screw Attack is one of the most powerful offensive upgrades in Metroid. When active, Samus becomes invulnerable and damages any enemy she touches while spinning in a jump. To get it, you'll need to delve deeper into Norfair, often requiring the use of the Varia Suit to survive. The Screw Attack is typically located in a hidden area, sometimes requiring you to bomb a seemingly solid wall or floor to reveal a path. Once you have it, use it liberally against groups of enemies and even some bosses. It makes traversal much safer and combat significantly easier.
