Part 48

Past the grenades, climb down a yellow ladder and go through another door.

Quicksave after the last door, as female assassins are in the large room ahead.

Crouch-walk forward until you reach a spot with a small fence on the left and two large gray pillars on the right.

Move past the nearest pillar and look between them for a stack of two large red storage containers.

Strafe left until you see an assassin's leg to the left of the containers and shoot it with a dart for an instant kill.

Switch to the hornet gun, crouch-walk past the fence, and locate explosive barrels between a red storage container and green crates.

Use altfire hornets to destroy the barrels and the assassin near them.

Watch for a second assassin running to the first; kill her quickly.

Go to where the explosive barrels were and take the passage to the right of the big doors.

Turn right to find stacked green crates you can use to hop onto a large red storage container.

Stay crouched, hop up, and look toward the upper walkway on the right.

Shoot the assassin crouching past the right gray pillar in the head with the crossbow.

Drop off the red storage container and look left for a crate-clogged passage.

Bash through the crates to find supplies and access stairs.

As you bash crates, an assassin will run onto the upper stairs; get out the crossbow, enter zoom mode, and shoot her head when she turns left.

Crouch-walk halfway up the left side of the first set of stairs with the assault rifle, then fire an AR grenade above the midpoint of the second set of stairs. Alternatively, crouch-walk up the right side with C4, toss a satchel, and detonate when the assassin appears.

Go up the stairs and along the left walkway to reach the assassin you sniped.

Go down the stairs to the left to find first aid and HEV stations; recharge.

Go back up the stairs and forward to a dark hallway with a small lift.

Use the flashlight to find and press the button on the wall to descend the lift.

Exit the lift to start section c3a2.

Go down a short hallway to a large tunnel section with explosive barrels.

As you approach the door past the barrels, it opens, revealing an alien grunt. Quicksave, then move backward slowly.

As the door opens, run forward to the lift and wait for a grunt to follow; if one does, hit it with an AR grenade and bullet stream.

Return to the short hallway and fire hornets over the explosive barrels toward the grunt-opened door.

If a grunt teleports in nearby, turn and altfire hornets at the nearest explosive barrels, then sneak-shoot it with the crossbow if needed.

Fire more hornets toward the grunt-opened doorway, moving to see through it if necessary.

Quicksave and check for more grunts in the big room past the doorway, under the orange sign.

Find the ladder in the back right corner, climb it to a walkway, and a scientist will open a door.

Turn left past the door for crossbow ammo on a green crate.

Wait for the scientist to stop talking, then lead him to the closed retinal access door.

After he opens it, kill him with the crowbar.

In the room past the retinal scan door, use the wall rechargers to restore health and armor.

Ride the small lift up by standing on it and using its button.

Turn right in the corridor past the lift to find the door to a test firing chamber.

Enter and pick up the gluon gun from next to the scientist.

When the scientist speaks, respond with "No, I don't!" and kill him with a quick gluon burst.

Use the buttons on the two control panels to open firing chamber doors and eliminate headcrabs in the left chamber and a bullsquid in the right.

Restock on ammo from the nearby shelf.

Leave the room and go down the corridor to a button-operated lift to section c3a2a.