Ultra Despair Girls (UP)

Story Related and Cannot be missed.

This chapter isn’t quite as long as the previous but still quite long. First you need to escape the tower, and head back to the base. You will face numerous arcade areas and enemies on the way. In the base you must eventually ward off an attack. Later you will take part in an odd minigame, and a Genocide Jack only section. You’ll fight a miniboss with Jack, followed by a main boss like normal. The weak spot on this one is under armor on the chest. To reveal the weak spot, you must first coax it into attacking you and getting the Axe stuck in the ground. Then you must shoot an enemy with paralyze to stun the robot, and you must quickly spam the weak spot with break. After the weak point is fully exposed, the enemies will gain shields, but this can be countered by using knockback on them first. After the boss is defeated and you go through some cutscenes and dialogue you’ll unlock this.