Assertion: doom's episode | /r/CapableOf | use same game engine
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text: As the episodes used the same game engine as the original game, id co-founder and lead programmer John Carmack instead focused on technology research for the company's next game, just as he had experimented with creating a 3D game engine prior to the development of Wolfenstein 3D. Between May and Spear of Destiny's release in September 1992, he created several experimental engines, including one for a racing game, before working on an enhanced version of the Wolfenstein engine to be licensed to Raven Software for their game ShadowCaster.