Tiayrret Island

Tiayrret Island is the island in the middle of the lake, in MySims Agents (DS). It is crucial to finishing the game. You have to Kite Surf there with the help of Chaz then play A-mazing maze to get to the second half of the artifact. Later, after getting a diving suit from Katie and T.O.B.O.R, you have to crack a series of puzzles to get to the Town Tresure before Theif V.