20 Things You Didn't Know In Metal Gear Solid V: Phantom Pain (MGS5)

20 Hidden Secrets in MGSV: Phantom Pain that you probably didn't know about. Examples include:
Using DM Generator to deactivate sleep mines, Decoy shocks, and laser detectors.
No Recoil when Quiet is using a sniper rifle.
What are Skulls?
Avoid getting Fultoned in Non-Lethal FOB.
Use Quiet to auto-aim your grenade throws.
It is possible to sleep on your backside with Ocelot and Quiet.
Jump off containers without rolling.
Stand on an edge outside of balcony.
Grab a guard over a barrier.
Secrets to the horn length and how it relates to Demon Snake.
How to get Online GMP.
Parasite weapons and shadows.
How Parasite Suit works.
Reason why there was no Chapter 3.
FOB Guards carry the same Walkman as Venom Snake.
Abort a Mission without going back to the helicopter.
How to lower floating guards:    • Kojima Didn't Expect You Do This in M...  
Make guards sleep by playing appropriate lullaby songs.
Gameplay walkthrough on PlayStation 4 Pro version of Metal Gear Solid V: The Phantom Pain.