Tourian is the final area of Zebes, a high-security Space Pirate base where Mother Brain resides. This area is heavily guarded by Metroids, the deadliest creatures in the galaxy, and numerous Rinkas. Your objective here is to navigate through the Metroid-infested corridors and confront Mother Brain. The Ice Beam is absolutely essential for dealing with Metroids, as it's their only weakness.
Be prepared for a gauntlet of Metroid encounters. Each Metroid requires a specific strategy to defeat. Conserve your Missiles and Super Missiles for Mother Brain, but don't hesitate to use them on Metroids if you're in a tight spot. Tourian is a linear path, but it's filled with danger. Make sure you have a good supply of Energy Tanks and Missile Expansions before entering.