Part 21

Between the container and the edge of the retaining wall above the steps you previously sprinted, throw 3 pods to ensure all ALs (Antlions) move to the pods.

ASAP (As Soon As Possible) 180 and head for the SC (Supply Crate) under the roof and against the wall. If rocket#1 is on the SC, pull the KB (Gravity Gun) and bust the crate. If it is to the right of the SC, pick the SC up and toss it toward the crates past the roof. If rocket#1 is to the left of the SC, move to the left of the SC and back up to it.

Shoulder the launcher and SAVE. When GS#5 (Gunship #5) has LOF (Line Of Fire) on the ALs, it will commence firing on them and ignore you for the first round or two. Send round#1 just before or as GS#5 appears beyond and to the left of tower#2. Track the round to contact then back step to ensure rocket#1 is collected. Send round#2 then head toward the crates and left. Track the round to contact as GS#5 advances, ASAP begin fast tapping the fire button for round#3.

GS#5 will be nearly overhead by the time round#3 exits the tube; remain exposed and constantly moving between shots #3 and 4.

As soon as round#4 makes contact, turn to your left then sprint to and along the building wall to SC#2 and rocket#2. GS#5 will retreat toward the towers for a moment then return. ASAP turn left and send round#5; continue toward the roof overhang for 10 feet to ensure tracking and contact. If you were quick about it, GS#5 is just about to pass by the leading edge of the roof overhang at the retaining wall when round#5 makes contact.

180, pull the revolver, then sprint toward the leading corner of the small glass-walled room (supply shack). Ensure you stop squarely in front of the first window from the left and begin firing. You need the mullion between the 2 windows for momentary cover (protection from enemy fire) from BG#2 (Combine Soldier #2).

You need to break the window and then kill or force BG#1 to move out of your LOF so you can quick switch to the GG (Gravity Gun) and draw rocket#6 to you. Ensure you send round#6 up and away from GS#5; the muzzle flash will temporarily blind you and may cause a miss. GS#5 drops below the perimeter wall and pulls away from the area before rising again to skirt over the top of the buildings for cover.

ASAP double tap 5 for the launcher then back pedal away from the small room. GS#5 should be flying over the small room and heading for the perimeter wall. If most goes smoothly and you send round#6 ASAP, it will succeed before GS#5 drops below the wall. ASAP sprint around the supply shack to the EP (Exit Point) while BG#2 is still occupied with ALs.

If you did not have a clear shot at GS#5 before it dropped below the wall, keep the rocket moving till it rises above.

Plan B: If you didn't send round#6 before GS#5 dipped below the perimeter wall or before it moved out of range, circle the supply shack to its EP then along the wall to the corner; guard shack#2 will be at your 1:00. Stop just before the corner; shortly GS#5 will reappear over guard shack#3, back peddling right to left over the center of the compound. GS#6 may be overhead and you may take fire from the BGs in guard shack#2. Take the shot; with contact, sprint back to the supply shack EP.

Both scenarios continue from here. Switch to the SMG (Submachine Gun), open the door and back step away from it as it opens. If you previously dropped BG#1 at the windows, spread the lead over BG#2 as you enter the room. If BG#1 is still breathing, HEG (High Explosive Grenade) the room before returning to the EP. When the WDs (Weapon Droids) have been drained and you take possession of the PB (Power Battery), exit the SC shack. Sprint along the wall toward the corner, sprint around the corner and head for dumpster#1. Run along the wall and look up to the Wkwy (Walkway) for BGs spawning at the MGTs (Mounted Gun Turrets). Enter dumpster#1 and SAVE. Switch to the GG and GGP (Gravity Gun Primary Fire) the EB (Energy Ball) to the East Beach, take a step out, look up, locate a BG and send the EB to it.

Once the OBGs (Outer Combine Soldiers) have been cleared, switch to the CB (Combine Barrier) and hold; listen for a lull in the GS (Gunship) noise. When GS noise quiets a bit, back out from dumpster#1 and face the center of the compound. Strafe left to look past and over dumpster#2. Locate the 2 OBGs at guard tower#3 and CB them. ASAP pull the pistol and kill the EBs lining the retaining wall railing then duck back into dumpster#1.

SAVE, switch to the GG; exit, turn right for the steps and sprint to the left side of dumpster#2. ASAP GGP+/- the EB away, to explode on the perimeter wall below guard tower#3, then sprint around the back of dumpster#2 to the launcher ammo crate.

ASAP GGP+ the EB away, reload and double tap 5 for the launcher. Sprint to the rear of dumpster#2 (G.tower#3 side) and SAVE. Preferably, at this point you should have 6 rounds in GS#5; unfortunately GS#5 isn't sending smoke signals. If you're lucky you'll hit #5 for the 7th time on your next launch. If your next successful launch isn't on GS#5, locate GS#5 ASAP. Removing GS#5 on round #8 just about doubles your survival odds.

The best approach is to keep moving. Your life was made so much easier by dropping GS#5. Use dumpster#2 and the perimeter walls for cover from GS#6. There are 2 MKs (Man-portable missile launchers) on the ground in the area around dumpster#2; a 3rd MK is in dumpster#2. You may be better off avoiding the dumpster MK until GS#6 is down. However, if you're near the ladder and GS#6 is out of sight, go for it. There is an oddity; often GS"X" blows a hole in the wall providing early access to Nova Prospekt before both GSs are down. Suggest taking advantage of it if close by, at low health, and aware of the event (big boom, hole in the wall, and fire all over the place).

Experimentation with the ALs and the 2 BGs in guard shack#2 suggests that the guard shack#2 BGs influence the number of ALs, and this effect appears to be significant.