This achievement is unlocked through the Babel gameplay mode, by completing the fourth stage: Axis Mundi. Babel's block placement is completely randomized, making strategies very difficult to create. This is absolutely the most outrageously difficult puzzle in the game. White, Vortex, and Cracked block types are all present here, but Vortex Blocks are the main threat. The blocks are often arranged in highly complex patterns, making it easy to collapse most of the tower just by moving the wrong block at the wrong time. Extensive mastery of the "Edge" mechanic is a necessity if you are to reach 300 steps. This Babel stage can also be played in Pairs which should significantly make it easier for you. If playing in Pairs, 168 steps are needed to complete it. The North American version of Axis Mundi is said to be "broken" and impossible to complete due to the unviable block drops so Pairs Mode is strongly recommended. For an in-depth strategy of each Babel Stage click HERE. If you somehow manage to do this not only will you unlock this achievement but also a special video from Trisha!