Here is the full list of all 14 Skeet: VR Target Shooting achievements.
Shoot down 50 UFOs
Play a perfect game of Skeet Mode
Get 15 or more points in Bounce Mode
Get 12,000 or more points in Trap Mode
Shoot every prop in Trap Mode
Set a high score with every gun in every mode.
Shoot all the metal animals in Skeet Mode
Get 8,000 or more points in Targetwall Mode
Get 2,000 or more points in Animal Gallery Mode
Shoot two clay pigeons at once
Shoot all four pigs in a game of Trap Mode
Shoot a clay pigeon
Get a time below 2 seconds in Quickdraw Mode
Find the dev room