Here is the full list of all 12 86 achievements.
Complete the game.
Die in the final room.
Complete the game in under 84 seconds without sprinting.
Complete the game in under 82 seconds without sprinting.
Complete the game in under 80 seconds without sprinting.
Die.
Die 86 times.
Visit every room in the game.
Try to push an object to the edge of the room.
Push 15 objects at once.
Find a friend.
Find all friends.