Thief is a stealth video game developed by the Canadian video game developer Eidos Montreal, and published by Square Enix. It is a revival of the cult classic Thief series of stealth games, of which it is the fourth game. Thief is set in a dark fantasy world inspired by Victorian, gothic, and steampunk aesthetics. Using a modified version of the Unreal Engine 3 it makes for a challenging game to pitch against our range of components.