ZZT's Revenge

Shortly after the release of ZZT, Tim Sweeney (the developer) started a level designer contest for registered users to make their own worlds and submit them to him. Over 200 users submitted their custom worlds. The best collaboration games that won the contest were included in The Best of ZZT and ZZT's Revenge, released in 1992. The winners of the contest received prizes of gift certificates, while others would receive honorable mentions. The six winning custom worlds that made up ZZT's Revenge earned the designers employment in Epic MegaGames, with the winning worlds being "Ezanya", "Fantasy", "Crypt", "Smiley Guy", "Manor", and "Darbytown".

ZZT is a 1991 action-adventure puzzle video game and game creation system developed and published by Potomac Computer Systems for MS-DOS. It is an early game allowing user-generated content using object-oriented programming. Players control a smiley face to battle various creatures and solve puzzles in different grid-based boards in a chosen world. It has four worlds where players explore different boards and interact with objects such as ammo, bombs, and scrolls to reach the end of the game. It includes an in-game editor, allowing players to develop worlds using the game's scripting language, ZZT-OOP.