Spear of Destiny, often also called Spear, Wolfenstein 3D: Spear of Destiny or just SoD, is a 1992 first-person shooter computer game developed by id Software and published by FormGen Corporation, and is the prequel to id Software's Wolfenstein 3D. As in Wolfenstein 3D, the player assumes the role of allied spy William "B.J." Blazkowicz, on a mission trying to recapture the Spear of Destiny from the Nazis after it was stolen from Versailles.
The game consists of a single 21-level episode, 19 of which need to be completed in order to win the game. The remaining two levels are secret levels that can be accessed from within the first 18 levels. The gameplay is identical to that of Wolfenstein 3D, which uses the same game engine. The levels can be divided into four blocks ("Tunnels", "Dungeons", "Castle", and "Ramparts"), each ending with the player having to defeat a "boss".
Unlike Wolfenstein 3D, the game did not include a shareware version; however, a 2-level playable demo was distributed.