A strange W has shown up on the map. Let’s go check it out. And bring your sniper rifle. And your rocket launcher.
As you approach a set of ramshackle structures (one of which has a poster), you’ll get a call to meet someone named Willis at the airport.
Approach the airport carefully—you need to take out six snipers without anyone seeing you, and the first is in a tower just to the left of the front gate.
Blast the sniper, then his little ground-bound support staff in the parking lot. Four more snipers are arrayed on the main airport tarmac, which you can see by either peeking through the fence or climbing the now-vacant sniper tower. Take them out in any order you like, but do not shoot any of the ground crew near the planes.
Airport
Guards
Mortar
Sniper 1 (in tower)
Sniper 2 (in tower)
Sniper 3 (on roof)
Sniper 4 (on roof)
Sniper 5 (in tower)
Sniper 6 (on roof)
Commander
Hide under first-story roof to avoid mortar fire.
Entrances to tunnel under runway.
The final sniper is on the roof of the yellow control “tower” right next to you, so creep around the base of the structure until you can get a clean shot on him. Then head up the control tower and follow Willis’s instructions.
After the cutscene, do as Willis says and provide cover fire for him when his meeting inevitably goes sour. This can be tricky, because he can meander and his warnings about where the enemies are coming from aren’t always precise. In his defense, he does have a lot going on at the time.
When the helicopter arrives, get off the roof immediately (even if you have a rocket launcher), because if the chopper’s big gun doesn’t get you, the mortar fire the enemy is about to blanket the roof with definitely will.
Once you’ve found cover (the ground-level overhang on the west side of the control tower, for instance), the mortar should lose track of you. Now’s your chance to snuff the mortar operator. He can be hard to locate, but you’ll find him in a little shack halfway up the cliffs to the extreme northeast.
Snipe him out, but be aware this will trigger the spawning of a few more guards, including one with a rocket launcher. Wipe out the remaining enemies. Once everyone is dead, Willis will come out of the warehouse.
After all this, the mission isn’t over. There’s one more thing to do. Just watch the cutscene, follow the instructions on screen, and . . . .
This part can be as tricky as it is cool. Like the glider, the wingsuit doesn’t gain altitude well, so only dive if you really, really mean to. And don’t oversteer. After you’ve caught up with the plane and showed off some very quick midair thinking, you’ll land and get a call from Willis that ends the mission.