By activating the pump to drain the waste pool prisoner 849 gains access to the main part of Terraniux - a massive greenhouse. It's up to them to get into the control room and unlock the rear enterance leading to Noork's Elbow.
Terraniux is growing examples of:
- Absurdly Spacious Sewer: The massive biowaste pools in the lower section full of surprisingly harmless Grimy Water.
- Air-Vent Passageway: More like pipeline passageway. You use it to bypass the locked door to the control room.
- Artistic License - Agriculture: The supposed hydroponic farms look anything but hydroponic.
- Door to Before: The door to the control room is locked from inside. You have to bypass it by crawling through some pipeline.
- Grimy Water: Subverted with the biowaste. It's fairly harmless. Unless you forget to resurface for air. Or get into the Slith's field of vision.
- Mook-Themed Level: Still inside the Terraniux complex you're going to exclusively face the hazmat suit wearing Mercs save a few additional Slith.