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From DoomWiki.org
→As a game engine
**[[Hexen: Deathkings of the Dark Citadel]] (1996): An expansion for use with Hexen providing additional levels, by the same authors, released as a separate product.
*[[Strife]] (1996): A science fiction game developed by [[Wikipedia:Rogue Entertainment|Rogue Entertainment]] and published by Velocity. Its engine is based on [[Versions of Doom and Doom II#v1.666|version 1.666]], or higher, of the Doom engine and the game includes [[Wikipedia:Non-playing character|NPCNPCs]]s the player can interact with, a degree of player character progression, and a particularly non-linear hub system.
*[[Chex Quest]] (1996): A modification of The Ultimate Doom styled after the [[Wikipedia:Chex|Chex Cereal]] brand, developed by [[Wikipedia:Digital Café|Digital Café]] and included in cereal boxes as a promotional bonus item. The game uses an engine based on the source code for The Ultimate Doom, modified to accommodate some necessary changes.
