Metal Gear Solid V: The Phantom Pain - S-Rank Walkthrough - Mission 42: [Extreme] Metallic Archaea
Metal Gear Solid V: The Phantom Pain - S-Rank Walkthrough Mission 42: Metallic Archaea [Extreme]
To get the S-rank you have to finish the fight as quickly as possible. You should pick the strongest sniper rifle you have. Either the "Brennan LRS-46" or the "Serval AMR-7".
First off, mark all 4 skulls. Climb up the roof of the hangar (in front of the starting point) and kill the first 2 skulls from there. Always request supply drops in advance so you never run out of ammo! When the first two are down the other two will usually walk around the hangar and you can't shoot them from the roof. So go down and take cover behind (or inside) the hangar.
D walker or quiet as your buddy ;) and the battle is won
There are two golden rules for getting S-ranks:
1. Don't try it on your first playthrough (a lot of strategies only work when replaying missions and you will unlock better gear over the course of the game).
2. Skip all cutscenes to save time (yes, cutscenes add to your time and will greatly reduce your points!)
S-Rank Strategies, basic tips and things you should know:
Getting 130,000 points in a mission unlocks the S-rank (same score requirement for all missions)
Completing the missions as quickly as possible without being seen is usually good enough. Skip the bonus objectives, they take too long and will complicate things.
Equipping the Invisibility Camo, Parasite Suit, Raiden Suit, Cyborg Ninja Suit, Chicken-Hat, Infinity Bandana, using D-Walkers Fulton Ballista or calling in air strikes / helicopter support will void the S-rank. With these items you are limited to A-rank at best. So don't use them!