You need to rotate the world as description tells you to. The controls on PC/Mac for rotation should be A and D, you can easily check in Options. You need to rotate the world in this order, and can be done anywhere in the game from the very moment you gain control of Gomez:
Right,
R,
Left,
R,
R,
L,
L,
LThis will net you (Gomez) an Anti-Cube, which you have to jump into to collect. The moment you do that, this achievement is yours, along with