Part 48

Go through the door past the grenades, climb down a yellow ladder, and pass through another door.

Quicksave (save your game progress) immediately after the last door.

Crouch-walk (move while staying low to the ground) forward from the door into a large room.

Stop at a point with a small fence on the left and two large gray pillars on the right.

Move forward until you are past the nearest pillar, then look between the pillars for a stack of two large red storage containers.

Strafe left (move sideways) until you see an assassin's leg to the left of the containers.

Shoot the leg with a dart from your crossbow for an instant kill.

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

Use altfire hornets (secondary fire mode) to destroy the explosive barrels and the assassin near them.

Watch for a second assassin to approach the first one after she is killed. Quickly kill the second assassin.

Proceed to where the explosive barrels were, then go down 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 as you hop up, and look toward the upper walkway on the right.

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

Drop off the other side of 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 your crossbow and zoom in.

Position yourself to barely see the assassin's head when she turns left, then shoot her in the head.

Alternatively, crouch-walk halfway up the first set of stairs with the assault rifle. Turn and fire an AR grenade at a spot above the midpoint of the second set of stairs.

Or, crouch-walk up the right side of the first set of stairs with C4 satchels, toss one past the stairs, stand up, run backward, and detonate when the assassin appears.

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

Go down the stairs to the left to find first aid and HEV stations (health and armor recharge points). Recharge your health and armor.

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

Use your flashlight to find and press the button on the wall to descend the lift. This starts section c3a2.

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

As you approach the door past the barrels, it will open, revealing an alien grunt.

Quicksave, then approach the door by moving slowly backward.

As the door starts to open, run forward to the lift. Wait to see if a grunt follows, and hit it with an AR grenade followed by bullets to the face if it does.

Go back to the short hallway and fire hornets over the explosive barrels near the grunt-opened door.

If any grunts are near that door, the hornets should hit them.

When a grunt teleports in nearby, turn and altfire- những quả bom nổ gần hắn cho đến khi chúng nổ, sau đó bắn lén hắn bằng nỏ để kết liễu hắn nếu vụ nổ không làm được điều đó.

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

There may be more grunts in the big room past the doorway, under the big orange sign.

After you think you've gotten them all, quicksave and check.

Find the ladder in the back right corner of the room and climb it to reach a walkway with a door a scientist will open.

Turn left past that door to find crossbow ammo on a green crate.

Wait for the scientist to stop talking, then get him to follow you.

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 get back to full 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.

Go inside and pick up the gluon gun from next to the scientist.

When the scientist says, "You don't look as if you have any trouble killing things," respond, "No, I don't!" and kill him with a quick gluon burst.

Use the buttons on the two control panels to open nearby firing chamber doors.

Destroy the headcrabs in the left chamber and the bullsquid in the right chamber.

Restock on ammo from the nearby shelf.

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