Here is the full list of all 50 Metal Gear Solid HD Edition: 2 & 3 achievements worth 1,000 gamerscore.
Defeat The Sorrow
Defeat Shagohod
Defeat Volgin in a fist fight
Defeat The Boss
Achieve a camouflage index of 100%
Finish the game on any difficulty
Get caught by Otacon stimulating yourself
Defeat The Fury
Defeat The Fear
CQC Hold up an enemy
CQC Slit an enemy's throat
Defeat The End
Kill The End before the boss battle
Defeat The Pain
Eat a snake of any type
Make Snake throw up
Create the Ocelot Time Paradox
Submit Ocelot
CQC Slam a guard and knock him out
Capture any animal alive
Complete a VR or Alternative mission
Beat the Tanker and Plant chapters on any difficulty
Defeat Solidus Snake
Defeat Metal Gear RAY
Hear Johnny's bowel noises in two locations
Break the neck of 30 enemies
Find Emma Emmerich
Defeat Vamp
Destroy the AV-88 Harrier II
Defeat Fatman
Meet Revolver
Disorient an enemy with a cloud of smoke from a fire extinguisher
Defeat Olga Gurlukovich
Kiss a poster in a locker
Send Otacon a picture of the marine with no pants
Tranquilize 100 enemies
Beat 30 enemies unconscious
Attain grip level 3
Take a clear photograph of the ghost image in Hold No. 2
Complete Boss Survival
Complete all Snake Tales
Collect all dog tags
Complete all VR and Alternative missions
See all of the first-person views that are not indicated by the RB button icon
Catch a Tsuchinoko (mythical serpent)
Find every type of camouflage
Find every type of face paint
Obtain title of MARKHOR
Find all 64 Kerotans
Finish game without killing anyone