A one-time visit dungeon. It is introduced when the player plays as Ouka and the other Mutant Apes as the begin their training. Eventually, Yuri and his friends infiltrate the research lab to find Nicolai. After getting possessed by Astaroth, he vanishes, forcing Yuri to escape.
Enemies
As Ouka
- Hien
- Raiden
- Armored Fighter
As Yuri and others
- Beetle Walker
- Flying Drone X
- Steel Soldier
- Master Cylinder (boss)