You need at least 7 full explosives and a bullet to defeat Raven, or 8 full explosives.
If tanking damage, do not spam grenades, you need to time them after standing back up.
Warehouse North
Underground Base (Rex's Lair)
Where to answer the first Otacon codec
Underground Base 2
Hold upleft on dpad
Where to answer the second Otacon codec
Underground Base 3
Where to answer the third Otacon codec
If on All Bosses, use the SOCOM to take out the guard
If on Any%, use skating to silence your footsteps and toss the guard
On the way back from computer room, go along the left wall, do not silence your foot steps
Drainage Ditch PAL Key (10+ Alerts)
There are 7 spots the PAL Key (and Bomb) can spawn
This only happens if you have 10 or more Alerts before entering the room
Rat and Room Temperature (Yellow)
The rat can hear you shoot regardless of distance, so unequip with R1 to avoid this. For example, the rat is by the turret and you shoot by the stairs.
Jumping into the ditch will spook the rat, regardless of distance.
Snake does more damage on Easy, making the fight faster.
Liquid does the least amount of damage on Easy.
During Phase 2, Liquid will run away on Easy and Normal if you attack with a kick.
Various 2, 1 and 0 throw setups
Escape Route
Only pick up the ration in the parking lot!
Guards deal 40 damage (5%) in the parking lot on EZ, and 42 damage during the driving sequence
There are two bottlenecks in the Parking Lot sequence. Your ally will not say “Snake, hold on!” until 9:34.60 on the timer. Therefore, your time can be no faster than 9:31.66. Video example here!
Aim at the corner of the metal for Checkpoint 1
Aim at the corner of the door to the left after Checkpoint 2 to aim for the left guard
Guards take 4 shots each on EZ
Liquid Jeep
Liquid Jeep - 16
Phase 1 (Swerve 1) - 3
Phase 2 (Tunnel Bumper) - (2 transition) 2
Phase 3 (Swerve 2) - 2
Phase 4 (Columns) - (2 transition) 3
Phase 5 (Side by Side) - 2 [7 total for phase 4 and 5]