Silent Obliteration is a power-up that allows Sly Cooper to finish guards off with an attack that does not alert other enemies. It is purchasable through ThiefNet, available from He Who Tames the Iron Horse in Sly 2: Band of Thieves, day 2 of Flight of Fancy in Sly 3: Honor Among Thieves and Turning Japanese in Sly Cooper: Thieves in Time.