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Quite possibly the most annoying achievement of the game, this occurs during Episode 3 Chapter 2 (Mirror Peak). Alan sucks at running, and takes forever to recover from a sprint, but dash as much as you can from the beginning through to the end. You can avoid a lot of fights here, so getting good at dodging Taken is beneficial. You can also run past the Steam Engine and the possessed items before it to save a lot of time. The "timer" for this begins after the phone call at the Mine Museum, and you can reload checkpoints to reset the time if you messed up along the way.