Before the Run
Any% Hard Disc 1
Dock
There are many possible variants to the Dock, but only one thing is required. You must alter right guard's path, or kill him. If you do not, you will not be able to get on the elevator quickly (assuming stealth).
Heliport
Tank Hangar
If you do not hold up on the analog for the Miller call, Snake will stop crawling. Be sure to move forward on the analog stick at the end of the call, so you won't stop. Feel free to switch to Dpad afterwards if you prefer.
Cell
hold triangle, hold dpad up, let go of triangle, hold X, let go of dpad up and x once standing
Hold up and triangle, release both, then press X to clip the vent. Don't press X too fast, or it won't work.
Step Count Out of Bounds
Down 2 Steps
Left 6 Steps
Up Left 3 Steps
Up 7 (edit: 8?) Steps
Right Into Door
Medical Room
Armory
Laser Pattern
Earliest point to start moving forward from the corner
Additional Strategies
Column 1 Backup, can also PPK the guard
Brush up Strategy
One Punch Strategy
3rd Column, aka
TAS Armory - It's all about Snake's spinning after the wake up, if you wake up right under the top-left lasers, you'll make a little turn, fitting properly into the middle area. Notice how I wait until Snake completely turns down after I pickup the PSG1. If you don't wait, you'll bump into the lasers on the right.
Canyon
Nuke Building 1F
Nuke Building B1/Commander's Room
Cave
Vent Glitch Hold Method
Communications Tower A
Communications Tower B Ascent
“Position your thumb at 10 o'clock while climbing the stairs, and 7 o'clock when descending. This way, you hug the exterior walls, run up the stairs in the most direct route, and don't become stuck or stalled on the banisters.” - Official Strategy Guide
Communications Tower B Descent
If you grenade the turrets, remember to pick up enough again before raven when grabbing the stinger a 2nd time after the wolf 2 fight.
Simple Boxclimb found by inSighT_
Full Tutorial by Plywood
Snowfield (Wolf 2)
Before the fight, save 2.5s with the FPV lean trick
Stinger Launcher