Gnop! was the first computer game created and published by Bungie. It was a simple Pong clone written and released nearly 20 years after the original. The name Gnop is Pong spelled backwards. The game was created by Alex Seropian in 1990, almost a year before Bungie's official incorporation. The game proved reasonably popular among Mac gamers because it was free and user-friendly. Bungie also sold the source code for the game for 15 US dollars.