Part 20

Begin by using pods to incapacitate enemies, allowing an Antlion (AL) to finish them. If ALs are slow or overwhelmed by other enemies (OBGs), use your shotgun to eliminate threats.

From the initial meeting with two men until reaching the Guardian, ALs will be hostile. Gather supplies from the sand area and proceed by jumping across boulders. Use long jump to reach specific boulders in the pallet and sheet metal section.

For the counterbalance puzzle, jump onto the wooden boards, use the Gravity Gun (GGP) to move a crate to the far end, then place it on the end you jumped from. Sprint and jump from the boards to an outcrop.

Reach the highest point near a tree with long planks, face the shack, and drop to a lower ledge. Long jump to the next plateau.

Retrieve a barrel from a shed, run down a ramp, and onto a stone outcrop. Place the barrel on the stone, then use it to reach a wooden platform.

Descend part of a ramp, then halfway down the next, and long jump to the lowest stone section. Run to the back of the next building to start the generator.

After checking supplies, head outside towards the thumper. Switch to the shotgun (SG), sprint onto the sand directly to the thumper, and recharge your suit meter.

Sprint to the next outcropping, climb up, cross over, and drop to a ledge. Turn 180 degrees to face the upper section for ALs. Use the SG to clear the area. (Note: In HL2ud, EBs are more spread out than in HL2).

From the ledge, sprint to cover. Sprint to each EB, use GGP to move them towards the Guardian, and retreat to a niche between a rock wall and boulders, past a rebel encampment.

Jump over or run around debris to reach the niche. Defend the niche as rebel gunners attack the Guardian. If possible, attack the Guardian with pistol rounds to hasten its demise.

Follow Vortigaunt's instructions and proceed with your new allies towards Nova Prospekt, dealing with OBGs and thumpers. Use pods extensively.

At the second-to-last station, clear the last station and surrounding area with pods, then return to the MGT and fire on OBGs from a dropship.

Remove two Zs by setting them on fire and collapsing a wooden platform to create a ramp. Pod the structure with Wkwys, switch to your pistol, toggle zoom, and eliminate any tower guards you can see.

Climb to the first Wkwy, jump the railing and a gap, climb doglegs, and pull the KB. Stay below the outflow pipe and attack the speeder when it exits.

Grab a pod, run through the pipe, and use the pod. Eventually, you will swim and climb out of a water pool. Locate and sprint to a low white building.

Along the wall, you'll gain line of sight on towers #1 and #2. Alternate podding these towers until all enemies are down. Sprint counter-clockwise around the perimeter wall to tower #2 and pod tower #3 until cleared.

(Note: This area is challenging on hard mode. The described method is effective for survival without restarts, though accidental suicides or getting caught in the open can still occur).

Assault on Nova Prospekt's Back Door: With your back to the perimeter wall and tower #2 at 12:00, strafe right. Aim to take out OBG#1 before it reaches cover. If it bolts, aim for the left corner of guard shack #1 and above the lower roof to catch it as it rises.

For OBG#2, use the revolver, toggle zoom, and aim for a one-shot kill. (If you have a gaming mouse, adjust DPI for a one-shot kill).

Pull a pod and sprint towards the compound steps. Stop 20-30 feet away and throw three pods towards the leading corner of the roof overhang, avoiding ALs.

Switch to the Gravity Gun (GG), sprint up the steps, and head for the EB at the far right end of the roof overhang. Grab and detonate the EB.

Immediately pull pods and throw them to the strip of pavement.