From Wikipedia:
The game is a first person adventure game, where the player moves through 3D environments, to find the safes to crack. The safes themselves vary in style and design, from safe to safe.
The games story revolves around a safe cracker, being hired by the family of a recently deceased billionaire and oil magnate, Duncan W. Adams. The player has been employed to find the will of Duncan W. Adams, by cracking the 35 safes that were in his possession.[2]