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