Here is the full list of all 15 Metal Gear Solid V: Ground Zeroes achievements worth 1,000 gamerscore.
Unlocked all trials
Cleared all missions (including Side Ops and Extra Ops) with a S-rank
Obtained all cassette tapes
In the "Destroy the Anti-Air Emplacements" Side Op, rescued and extracted all prisoners via chopper
Cleared the "Jamais Vu" Extra Op with 0 enemy combat statuses
Cleared all missions (including Side Ops and Extra Ops)
Obtained all XOF unit patches
Cleared the "Intel Operative Rescue" Side Op without killing a single enemy
Cleared the "Classified Intel Acquisition" Side Op while riding in the back of a truck
Cleared the "Eliminate the Renegade Threat" Side Op by extracting both targets
Cleared any mission (including Side Ops and Extra Ops) with a S-rank
In the "Ground Zeroes" mission, rescued the prisoner to be executed and extracted him via chopper
Cleared a Side Op or Extra Op
Cleared the "Ground Zeroes" mission
Reunited with Chico or Paz