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