Nightfall is an American computer game released in 1998 by Altor Systems, Inc. Although claimed to be the first real-time 3D first person adventure game, there are earlier examples of 3D first person adventure games, however, such as Total Eclipse, released in 1988. It employs a three dimensional world and sprites for objects such as vases and rats, as well as true 3D objects such as blocks and statues. Essentially, the gameplay is a combination of 3D first-person shooters such as Doom, the gameplay found in Myst, with some additional elements.
