Here is the full list of all 32 In Sound Mind achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Give a mannequin a face
Collect all vinyl records
Find Rosemary's secret song
Finish In Sound Mind
Finish Tape 5
Give Dave a high five while fighting for your mind
Collect all pills in your building
Find all pills in the game
Find and listen to all of Lucas' session fragments
Finish Tape 4
Collect all pills in the forest level
Stun The Flash using your Radio Device
Find all weapons in the game
Collect all pills in the factory level
Finish Tape 3
Trick The Bull into attacking an inkblot
Access top secret Mayer lab
Ride The Bull for 5 seconds
Acquire the Shotgun in your building
Collect all pills in the lighthouse level
Finish Tape 2
Shoot down a Shade projectile
Damage The Shade using a weapon
Shoot a crow
Acquire the Gas Mask in your building
Collect all pills in the supermarket level
Finish Tape 1
Scare The Watcher away using the Mirror Shard
Push a cart into the water on the way to Homa Mart
Hang up on your sneaky stalker
Acquire the Pistol in your building
Pet Tonia