Part 6

Navigate Half-Life Part 6, from the zombie ritual to the canal area. Learn how to use scientists and avoid hazards.

Walkthrough:

1. Back in the main room, find a door with a headcrab behind it. Open it, retreat, then shoot the headcrab from a safe distance.
2. When you reach a ladder, equip your pistol. Climb slowly and shoot the top of large explosive containers to destroy the zombie and headcrabs nearby. Quicksave before attempting this.
3. Alternatively, use a movable metal barrel near the initial door. Push it to the area with the ladder, against the wall opposite it. Jump-crouch onto the barrel to reach a vantage point where you can shoot the explosives twice without taking damage. If you take too long, headcrabs may escape and attack a nearby scientist.
4. Proceed along the walkway past the ladder. At a dead-end area, a zombie will be performing a ritual over a dead scientist. Look for a large explosive device; it may have been detonated by houndeyes earlier.
5. If the explosive is not present, head-shot the zombie to death with your pistol. If it is present, lure the zombie close to the explosive, then retreat around a corner and shoot the explosive twice when the zombie approaches. Run backward immediately after firing to avoid damage.
6. Return to the top of the ladder and go left to find a scientist. Talk to him to have him follow you back to the zombie ritual area. He will use a retinal scanner to unlock a door, granting access to a room with a first aid station, hand grenades, and bullet clips.
7. Return to the houndeye room. In the corridor ahead, push a movable barrel close to the door. Position yourself to hear a teleporting sound, then get behind the barrel. After a vortigaunt breaks through, toss a grenade into its room. Enter the room to find more bullet clips. If a headcrab approaches as you exit, shoot it.
8. Past the D475-KL sign, a zombie will climb through a grating. You can ignore it. Toss a grenade down the hole in the floor on your side of the bars to destroy a headcrab in the water below. Toss more grenades if needed, then return to the room with grenades and resupply. Drop down the floor hole.
9. Explore the watery tunnel until you find a cement platform with a valve wheel. Use the wheel to flood the area, then swim to the nearest ceiling grate, which will open. Ignore the nearby zombie and proceed down the hall to section c1a1c.
10. In section c1a1c, find two bullet clips near a dead security guard on the walkway next to a platform lift. Instead of using the lever, drop from the right side of the unmoving platform onto a sloped surface and hold