Here is the full list of all 50 Metal Gear Solid: Peace Walker HD achievements worth 1,000 gamerscore.
Cleared Chapter 5: Outer Heaven.
Threw a chaff grenade at ZEKE (single player only).
Assembled all special staff members.
Read all of Strangelove's memoirs.
Completed Metal Gear ZEKE.
Reached at least 100 hold-ups to incapacitate the enemy.
Nicely cooked a ration.
Recruited Hideo Kojima.
Rolled 100 times or more in a single mission.
Obtained Rank S on a date with Paz.
Cleared Chapter 4: The Illusion of Peace.
Defeated Pupa, Chrysalis, Cocoon, Peace Walker.
Cleared Chapter 3: A Nation Reborn.
Performed a Leap of Faith.
Performed CQC six times in a row.
Read Huey's love letter.
Cleared Chapter 2: The Phantom Hero.
Reached at least 100 stun attacks or sleep-inducing attacks.
Captured a mech.
Carried out a mission in OUTER OPS.
Cleared Chapter 1: A Country Without An Army.
Exchanged items back and forth with another player using Delivery.
Shot enemy right in the middle of the rear end.
Attacked enemy soldiers by blowing up an oil drum or truck (single player only).
Cleared Prologue: An Army Without Borders.
Put on a cardboard box.
Clear every achievement.
Clear all MAIN OPS missions at Rank A or higher.
Clear all MAIN OPS missions at Rank S.
Clear all EXTRA OPS missions.
Clear all EXTRA OPS missions at Rank A or higher.
Clear all EXTRA OPS missions at Rank S.
Clear all MAIN OPS and EXTRA OPS missions at Rank S.
Reach 50 or more game overs.
Reach 300 or more Fulton recoveries.
Reach at least 100 kills.
Obtain every costume.
Obtain Infinity Bandana.
Obtain stealth camouflage.
Hear a ghost on the radio.
Read all of Paz's diary.
Clear all hunting quests.
Customize ZEKE's head parts and foot parts with special AI weapon parts.
Clear "Capture the Enemy Base 06" in OUTER OPS using only soldiers.
Carry out a trade.
Obtain Rank S on a date with Kaz.
Play using all of the rules in VERSUS OPS.
Reach a total of 20,000 or more Affinity Points.
Collect a soldier using a divine wind.
Throw a Peace Walker together with three other people.