Games intended to be run under Fidonet-era bulletin board software. They're called "doors" because they were separate programs that would run on the BBS host. Since machines didn't necessarily have multitasking capabilities, the main BBS program would "shell out" and start up the door program, which would then communicate with the user. When the door exited, the BBS software would start back up. Hence a door -- an excursion from the BBS to the outside world.
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Break Into Chat
Wiki features articles, screenshots, and downloads for more than 40 BBS door games.
Cheepware BBS doors
Developer of BBS doors such as FreeLiner and The Magic Oracle.
Doorware Distribution System
Offers searchable database of door games for download.
GameSrv BBS Door Game Server
Standalone telnet server for hosting old BBS door games that works on modern Windows and Linux systems.
Home of Galactic Overlord, Mines of Gorr, and several dice games.
John Dailey Software
Developer of BBS Door games such as Barren Realms Elite, Dungeon Master, and Global Backgammon. Offers Bulletin Board System utilities, game information, and online ordering.
Operation: Overkill World HQ
A forum where fans discuss the BBS door game Operation: Overkill II.
Scott M. Baker games
Developer of Land of Devastation and Galactic Warzone. Includes source code to many unfinished door game projects.
Sunrise Door Software
Developer of more than 70 BBS door games such as Gangland Wars, Concentration and Dominoes.
Site features collection of current and previous Usurper releases.