This can be easily done in chapter zero after getting out of the play pen. In the corner of the room with the closest should be a set of pins and a bowling ball.

You can do this by picking up the bowling ball with a left-mouse click and throwing it with your right-mouse click towards the pins. Another way is to knock the pins over by dragging the bowling ball over them. Either method should unlock the "Strike" achievement.

REPORTEDLY BROKEN BY OTHER PLAYERS. This achievement takes place over the course of the first to second chapter. In the first chapter after you find teddy head downstairs through the hall until you enter the living room.

As soon as you enter the room to your left should be a grand piano; play it.

This can be done by climbing onto the seat of the piano and lifiting the lid. Which should give you the option of interacting with the grand piano as much as you desire.




After this you can continue on until you reach chapter two. As soon as you start chapter two a toy xylophone will be right in front of you as soon as you exit the tunnel. Interact with it, you should get the "Baby Mozart" achievement.

It seems if you don't interact with both the grand piano and toy xylophone at some point throughout the game, the achievemen won't unlock.

In the fourth chapter another music box can be found in the first side closet you encounter. Which would be right after getting past the first bridge. All you need to do is interact with the music box and the achievement "Bad Lullaby" should unlock.

The achievement "Competed Among the Sleep" should unlock once you beat the game.