Override Key (Bioweapon Repository 11)

Systems Management (B4): wall panel on the east side. You get there by the east stairs of Bioweapon Repository 12 after pressing its two switches (Bioweapon Repository 12 and Generator Room).

Restores power to Bioweapon Repository 11: the north elevator panel takes you to the top level.

Once you take it, on Casual and Standard 6 Licker β2 wait on the Bioweapon Repository 11 ceiling: go in slowly and use the room's red explosive canisters and a Stacked Hand Grenade. Systems Management also holds a Hand Grenade, a Med Injector and 12.7×55mm Ammo ×2.