The area is divided into a number of chambers, starting with the namesake underground waterway, then a small prison complex, and finally a trap room. The first two areas are inhabited by Novistadores. The trap room is filled with swinging axes.
In order to progress, the player must travel through the pathway behind the prison cells to find a valve which will drain a pool of water and allow Leon to continue. Leon can break down some of the doors to the cells for items and Luis' Memo. He will encounter Novistadores either way, some coming from holes in the ceiling, some emerging from cell doors (including one who knocks down an locked cell that has an Incendiary grenade in it. The Butterfly Lamp, a valuable treasure which can be combined with the variously colored eyes dropped by the Novistadores, can be found in the valve room.
After making it out of the prison complex, there is a hallway with swinging blades which requires Leon to time his running and jumping to avoid getting hit.
|The far left or closer right door in the cell area, and the one door in the hall||OPEN||This door's too rusted and it won't budge!|
|The corpse||CHECK||It looks like he was alive until just recently. Judging by the wound, it was a quick death.|
|The water before its drained||CHECK||(view the gate) There's gotta be a way to drain the water.|
|The valve||CHECK||(view valve) It looks like a drainage valve. Drain the water? (choice: Yes / No)|
- Koichi Hamamura, ed (2006) (in Japanese). biohazard4 kaitaishinsho revised edition. Famitsu. ISBN 4-7577-2638-4.
- ↑ Hamamura (ed.), kaitaishinsho, p.248.