How to get S Rank on METAL GEAR SOLID V: The Phantom Pain Mission 30: Skull Face

Venom Snake was told to reach Skull Face to gather some information. For that, Venon snake had to pass the OKB Zero Outpost which had a lot of Skull Face's Troops.

I heard most people got like A - B rank in this mission, even without any trace, sneaking the entire way in OKB Zero took very long enough, i keep getting A rank on this mission in the stealth way.

Okay, i'll get to the point, I found out a way of how to solve this, so you need a tank, any type of tanks, like TT77 Nosorog or M84A Magloader both works, deploy your tank in Mission 30, and the tank should spawn right where you start, then ride the tank. Proceed to OKB zero, it doesn't matter if you're spotted by guards, just go further to the end of OKB Zero, when you reached at the end, get out of the tank and quickly go upstairs, you can use some kind of shield too, to protect yourself from the back when getting out of the tank, if you go upstairs, you will meet Skull Face, the rest of the mission are cutscenes.

Most people are trying to get S rank on all missions (Except Extreme mode), the reward for getting S ranks on all missions is "Raiden's Suit", if you don't know, Raiden's Suit gives you the effect to run very fast, i'm gonna say this reward is worth it.

I hope this small guide helps you a little!

Have a good day!