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In [[Wikipedia:Microsoft|Microsoft]]'s [[Wikipedia:Microsoft Excel|Excel 95]] spreadsheet program (included in the [[Wikipedia:Microsoft Office|Microsoft Office 95]] [[Wikipedia:Office suite|office suite]]), there is an Easter egg known as the ''Hall of Tortured Souls'', a three dimensional raycasting game engine created as an homage to ''Doom''. [http://www.eeggs.com/items/719.html] The existence of this Easter egg is one of the results of the "religion" said to have arisen on the Microsoft campus in the wake of Doom's release. <ref name="mastersofdoom">{{cite book |author=Kushner, David |title=. [[Masters of Doom|Masters of Doom: How Two Guys Created an Empire and Transformed Pop Culture]] |publisher=. Random House Publishing Group |year=, 2003 |isbn=. ISBN 0-375-50524-5}}</ref>

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