Use a ceiling-floor loop to get the cube to high speed then fling it from the opposite wall to the monitor. Move the cube to the lower section of the level. Instruction for breaking each monitor: Chamber 1 I've now counted 16 monitors in Chapter 8, but you can ignore the first 5, so you need to break all the monitors from the one found in the test chamber numbered 1/19, up to the start of Chapter 9. Right, I've hit the achievement, and here's the info:
