This Room is only accessible by Agents and was opened during the 2020 Water Party. Once you go through the door behind the waterfall, you will enter a small room that was seemingly occupied by Rory , shown from the notes, picture and newspaper. In the middle of this room is a giant hatch leading to the pipes below the island. During the mini-mission, A Welcoming Flood, the player needs to navigate these pipes to find Richard's mission report and access the Water Engine Room. The mission report is located alongside a mural of Richard himself near the start of the maze.
The Pipeline has various Easter Eggs hidden throughout it:
- In the starting room there were notes signed by Rory as well as a picture of the Stage during the Plaza Reconstruction.
- The first issue of The Penguin Times could be seen on a box.
- The mural of Richard is a reference to Portal 2's Rattman murals.
- Cans of Beans can be seen with the mural that resemble the ones seen in Portal 2.
- A Teenage Mutant Ninja Turtles mask can be found alongside a canister of Mutagen Ooze.