Gateway

The Gateway is a large central room in the Bryyo Cliffside. Upon entering this room, Samus Aran surveys the stone architecture of the Bryyonian structure. Here, she must disable two Morph Ball Bomb-linked security locks in order to open a gate and progress to the Grand Court Path. These Bomb Slots can be accessed by Space Jumping to platforms, as well as crossing a rather unstable stone bridge. She eventually can activate an orange Bomb Slot, but this triggers various events: A physical barrier blocks one of the platforms she used, while another opens to allow her passage to the next Bomb Slot, while Phazon Nightbarbs approach Samus. She then must Grapple Lasso to pull down a platform, causing so much vibrations that the said unstable bridge collapses. She may then activate a green Bomb Slot, opening the gate, but also releasing some Gel Puffers. She then continues on her journey through Bryyo.

Inhabitants

 * Respawning Phazon Nightbarbs (After activation of first orange Bomb Slot in room until activation of second green Bomb Slot)
 * Two Gel Puffers (After activation of the green Bomb Slot)
 * Two Reptilicus (After reentry of the Gateway in future trips)
 * A swarm of Nightbarbs (After the defeat of said Reptilicus)

Connecting rooms

 * Gateway Hall (via Blue Door)
 * Grand Court Path (via Red Blast Shield)
 * Reliquary II (via Blue Door)
 * Crash Site (via Blue Door)

Items

 * Missile Expansion: Entering the room originally blocked by the gate will reveal a Morph Ball tunnel that splits in two directions. The right tunnel will be blocked by a metal object. Grappling it three times will unblock the tunnel. Samus can then roll through the right side of the tunnel to a passage leading to Reliquary II. While walking there, Samus will discover a second, open walkway to the right, at the end of which is a Morph Ball tunnel blocked by ice. Samus can then shatter the ice with a Plasma Beam shot, and roll into the tunnel to find this expansion at the end. The end of the tunnel sends here into the green Bomb Slot where she falls in front of the Gateway Hall entrance.