The Portal Chamber is a room in the Torvus Bog area of Aether. At first Samus Aran cannot access this room because it is on the other side of a gate that cannot be opened from Torvus Lagoon. Most of the room is composed of a Morph Ball tunnel and while going through, Samus will see a Portal and a Missile Expansion.
- Missile Expansion
- If Samus comes to the part of the room on the Poisoned Bog side in Dark Aether, there will be a Morph Ball elevator that will transport Samus into the center of the room. By entering the portal there, Samus can achieve a Missile Expansion.
- Dark Portal (inactive)
- "This rift portal is inactive.
The portal field can be energized with dark energy. Walk into an energized portal to transport to Dark Aether."
- Dark Portal (active)
- "This portal is active.
Walk into the portal to transport to Dark Aether. Extreme caution recommended once transit is complete."
- This room seems to have been sloppily redesigned during development. There are two invisible Spider Ball Tracks on the room's rocky walls; one on the inside of the chamber, to the right of the Missile Expansion, and one directly across from the door to Torvus Lagoon. Both of these Spider Ball Tracks cause the Morph Ball to spin rapidly when attached to. The invisible tracks appear to be improperly implemented, as they pass directly through solid rock, leaving the player unable to follow the entire path of either one.
- Additionally, the room contains a gap in its collision geometry, allowing players to easily access a Secret World. Within the inner chamber of the room, on the east wall, there is a vine. Jumping at the wall to the left of this vine will cause the player to simply pass through the rock face.