Primus Castle is mainly a large castle with many rooms in it.
White Bomberman finally makes it through the Woods of Esuram and enters Primus Castle via the sewer system. Two guards can be seen taking Princess Millian away and White Bomberman makes chase. Eventually, White Bomberman is confronted by Nitros once again and the two rivals get into another battle. White Bomberman defeats Nitros but is too late as Princess Millian has already been taken away from her castle.
- Water Pool
- Has two separate exits
- Vs. Nitros