I consider Thief to be a part of my identity.īefore Thief, the game that f undamentally reshaped my perception of what games could be and do, was Doom. It is indisputably my all-time favorite game, it has been for the last two decades, and it probably will forever remain so. It is definitely one of the fundamental games that defined stealth genre and immersive sim school of design. It is arguably one of the greatest games of all time. 20 years ago today, Thief: The Dark Project was released.