That something that shakes...
Bouncy, bouncy~

Ok this would be the only achievement that would require a guide, the rest of the achievement are story related and doing some other misc stuff.

So let's get started, go on the options - Effect & Sound - Chest Bouncing and push the bar the right side, should looks this:


Then launch the and press P and the achievement will pop up (see what i did here? :P).

Cheers guys!