Super Sleuth

From Halopedia, the Halo wiki

Super Sleuth

Super Sleuth is an Achievement in Halo 3: ODST. It is unlocked when the player finds the final clue to unravel the mystery, either alone or with another ODST. It is worth 10 Gamerscore.[1] It will unlock upon beginning the Kikowani Station mission, having started a complete run through in the correct order.


There is a Marathon symbol in the background, behind the actual symbol, in the gold circle.