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T get this one, start a new game, and of course you'll start at episode one chapter one. Smash all the street lights like you've done before. You should receive the achievement in the area just before the final fight with Clayface. NOTE: as soon as you get the in game notice that you unlocked the achievement dashboard the game (in case someone doesn't know what that means; hit the center button with the X on it select Xbox dashboard, finally select yes to confirm. There is no need to save and finishing the level with save the game)