Bast Castle, Lower Floor
New Weapons: Merr-Sonn Missile System
You start with Kyle telling you to go to the door NW of you, its locked, so you go to the other door, that was almost in front of you at the start.(cutscene)
Jump out of the compactor, and go in the opposite chute that Kyle went in.
Waste everyone here, then use the console.
Go into the door to the left of the console you used.
Make another left for a secret behind the boxes.
Go back through the other open door.