Half-Life: Opposing Force Part 51 Walkthrough

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Walkthrough

1
The hallway past the crate has enemies. You can sneak-shoot them with hornets. One enemy hides in the second doorway on the left.
2
If detected, retreat to the fallen door in the elevator shaft and shoot from there.
3
Locate the large red wheel on the wall and use it to activate steam vents.
4
Approach the steam vents but do not enter. Aliens will begin teleporting in.
5
Run into the nearby room and go through the door in its back right corner to avoid incoming fire.
6
After a few seconds, return to the doorway and use hornets to hit enemies in the steam.
7
Strafe into the hall to lure surviving aliens into the steam, then retreat to cover.
8
If only vortigaunts appear, throw a grenade toward the back wall past the steam to make an alien grunt appear. This grunt may not appear otherwise.
9
Shut off the steam using the same wheel.
10
Two more grunts are around the corner past the steam vents. Quicksave and attempt to sneak-shoot them with hornets.
11
If they attack aggressively, quickrestore and get the security guard's help, or use heavier weapons like the crossbow.
12
At the end of the hallway, find a ladder leading down to a small optional area (section c3a2f).
13
To safely descend, crouch-hop onto the railing and run onto the ladder from there.
14
Section c3a2f: SIDE AREA WITH SUPPLIES
15
In the room at the bottom of the ladder, note the numbers 2, 4, and 7 written in blood on the floor next to a reactor core diagram.
16
Use stacked crates to hop over a fence and land on a walkway in a dark, wrecked room.
17
Crouch-walk under a fallen beam to find a health pack and Gauss Gun ammo.
18
Crouch-walk back under the beam and use the ladder on the left side of the fence to return over it.
19
Return up the tall ladder to section c3a2c.
20
Section c3a2c (again): ASCENDING THE CORE, PART 2
21
Go through the "CORE LEVEL B" door in a side hall.
22
Walk next to the teleporter orb closest to the core fence.
23
Watch the nearest orb past the fence for a rotating platform.
24
Enter the portal next to you when a rotating platform moves under it to reach the moving platform.
25
You will rotate around ports 1, 2, and 3. Port 2 leads to the next level.
26
Jump into port 1 to be teleported to a headcrab-infested area.
27
Kill the headcrab ahead in the grate-floored room with hornets.
28
Another headcrab will drop near the ladder; kill it and any subsequent ones.
29
Kill headcrabs in the two dark side niches along the right wall, using your flashlight. Each niche has three headcrabs that drop one at a time.
30
Go to the edge of the grate-floored room and kill a headcrab near the wall with hornets. Wait for more to fall, or check the ceiling if none appear.
31
Kill the headcrab to the left of the portal on the platform at the other end of the room.
32
Use altfire hornets to shoot floor gratings to find breakable ones, or walk along the floor beam across the room to a spot near the ladder.
33
Jump to the ladder and climb it to the portal platform.
34
Get hand grenades from a crate near the portal, then go through it to return to the starting teleporter area.
35
Once back on a rotating platform, go through port 3 to a secret supply room. Get supplies, then use the exit portal to return to the starting area.
36
This time, go through port 2. Jump to the port 2 ledge, not directly into the port. Try jumping when the rotating platform is approaching port 2.
37
Quicksave, then look up at the portal directly above.
38
Wait for a rotating platform to appear under that portal, then quickly back into port 2.
39
Immediately crouch, as the platform will move under a pipe between ports 6 and 4.
40
Wait to jump into port 5, which leads to a room with supplies and three scientists.
41
Go through the room's door and down a hallway to another room with supplies and a portal back to the starting teleporter area.
42
Go through port 2 again to reach the next level.
43
Jump to port 4's ledge and quicksave.
44
Look up and right to see the portal port 4 leads to, and enter it when a moving platform is available to land on.
45
Crouch when your platform is about to move under a pipe.
46
Jump into port 8 to be t

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