Here is the full list of all 13 Batman: Arkham VR achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
Identify the witness
Discover doll sized characters
Unlock access to the Batcave
Identify the murderer
Destroy all 18 CCTV Cameras, Fuse Boxes and AR Batarang targets
Find and zoom view on the Mad Hatter cameo
Piece together Riddler Trophy, Cube and Cane in Riddler case file
Activate thrusters on a Bat vehicle
Place the two lungs, eyeball and cranium in to their correct locations in the anatomical model
Score 30 or more on the Batarang trial
Analyze all five blood samples for infection
Analyze all four pieces of evidence from Batman's past failures
100% the game. Complete the main story, find all Riddler secrets and acquire all the trophies