Minecraft wiki entry for Easter_eggs, associated text: In snapshot 13w36a for Java Edition 1.7.2, Dinnerbone added a Super Secret Settings button, which could be viewed in the options screen. Clicking it would blare a random game sound with a lower pitch and change the shader of the screen. These effects would not necessarily work on computers without a graphics card that supported OpenGL 2.1. This was removed in snapshot 15w31a for 1.9.