Thief is a game that, aside from the sequel, is so utterly unique and influential in the history of game design that not having played it makes you a bad person. Well, a bad gamer anyway. This still fits into my Top 10 (with T2: the Metal Age easily in my Top 5) all time. Everything about the game seems so simple and obvious but when you start replaying the missions you find an unbelievable complexity for what is essentially a remastered shooter. Latter-day games like Borderlands owe this game an enormous debt.
