Part 22

Make your way through ground fires to a new hole in the exterior wall.

Locate and use valves to extinguish gas fires, then proceed through rooms to the beginning of Nova Prospekt.

Pass through the XP (experience point), jump the Wkwy (walkway) railing, and pull the KB (keycard).

Locate the room with a hole in the wall and climb in.

KB or GGP+ (gravity gun plus) the HC (headcrab) in the wall cavity and GGP+ the MGTs (man-grenade turrets) as you go.

Climb the stairs, locate the CR (control room) and use the WDs (water dispensers).

Exit, locate the stairs, then GGP+ the next 2 MGTs.

Pass through the XP (the only available doorway) then stop at the head of the stairs.

From the top of the stairs, look left and down past the railing to a large vertical "S" shaped pipe. Just past the pipe is a large white and rusted tank.

Turn left to face the railing and wall, jump onto the railing; the wall will prevent you from overshooting the railing and falling into the water.

Sidestep right then jump onto the horizontal section of the pipe and then to the top of the tank.

Side creep left to the wall and forward to the edge of the tank.

Drop off the tank to the Wkwy to the left of the Barnacles then exit the room.

Run up the debris ramp and through the hole to the floor above then sprint to the double doors.

Sprint out of the room to avoid spiders dropping from the ceiling.

Sprint along the left side Wkwy and drop to the floor below before the spiders can get a bead on you, then sprint through the gate to the large room.

GGP-/+ (gravity gun minus/plus) a couple barrels at the MGTs on the upper Wkwy.

Sprint up the stairs and around the Wkwy to the Lambda symbol.

Remove the boards covering the glass with the GG (gravity gun) in Half-Life 2, or use the KB in Half-Life 2: Update.

If you are below 60% on both meters (health and suit charge), remove the boards and hop through the window for supplies.

Climb the stairs, and continue to the small room, KB or GGP+ the HC and clear the blockage.

Enter the long narrow Hlwy (hallway), look down and back to see the debris blocking the XP.

Sprint the long narrow Wkwy past the communal Lavatory and showers to the railing.

Face the rail and look to your 1:00 (one o'clock direction), crates and a wall corner; jump the railing and run to and just a bit past the wall corner.

The guardian will bust through the double doors and enter the room.

Just as the legs of the guardian appear from the edge of the corner, sprint around and past it into the room it came from.

Sprint to the XP (double doors), jump onto the debris, crouch, open the doors and exit.

More ALs (allies) will join up with you in the room; pull the revolver and move to the left edge of the XP.

If you see BGs (Combine soldiers) standing beyond the crates through the fence, before you crouch, head shoot them first, then crouch and sidestep into the Hlwy, head shoot any remaining BGs.

Stand, QS (quick scope) to GG then sprint toward the common room, drift left and GGP- the barrel as a shield, then BH (boost hop) to MGT#1 and GGP+ it, GGP-/+ MGT#2.

Assume you need to clear MHs (manhacks) and the OBG (outer Combine soldier) on the upper Wkwy; unless the ALs already took him, otherwise switch to the GG and kill some MHs.

Pull a pod and pod the area in front of the cell block gate to move the ALs into position.

Switch to PR (pulse rifle), and move to the side of the gate, switch back and forth between the PR and pods, the ALs keep the BGs busy enough to ignore you and allowing you to pod them, making their matters worse.

Enter the cell block, GGP any remaining MHs, then switch to the SG (shotgun) and head for the SS (security station).

If the cell is empty, the CR EP (energy pulse) will be closed and 3 BGs will be in the CR. GG or shoot the SS power plug, reload and or switch to the SMG (submachine gun) then enter the cell. If the BGs still haven't entered the cell, open the CR door, back step and HEG (high explosive grenade) the room.

If the cell has 2 BGs, the EP to the CR is open and only 1 if any BGs will be inside; kill the 2 BGs then pull the SS plug.

PR or SG the BG in the CR and flip the switch, clear the CR XP and exit.

Ensure the gate switch has been pulled, clear the XP and exit the CR.

Run upstairs, jump over the LWM (laser tripwire) and exit to the Wkwy, target the doorway for a bit.

If no BGs pass through, let the lads deal with the OBGs in the CR.

Pick through all the SCs (supply crates) on the Wkwy; if you don't absorb the CB bolts, pick it up and drop it to the floor below.

Check the cell then return to and enter the CR.

Switch to the CB (combine bat), flip the switch then sprint out to the Wkwy, hop over the railing.