of the Apogee episodes, Spear of Destiny, was released through FormGen on September 18, 1992. FormGen later published two mission packs titled "Return to Danger" and "Ultimate Challenge", each the same length as Spear of Destiny, in May 1994, and later that year published Spear of Destiny and the two mission packs together as the Spear of Destiny Super CD Package. Id released the original six Apogee episodes as a retail title through GT Software in 1993 and produced a collection of both the Apogee and FormGen episodes released through Activision in 1998. There were two intended promotions associated with the original Apogee release, both of which were cancelled. A pushable wall maze led to a sign reading "Call Apogee and say Aardwolf" ("Snapity" in beta versions); it was intended that the first person to find the sign and carry out its instructions would win a prize (consisting of US$1,000 or a line of Apogee games for life), but the quick creation of level editors and cheat programs for the game soon after release led id and Apogee to give up on the idea. Additionally, after completing an episode the player is given a three-letter code in addition to their total score and time. This code was intended to be a verification code as part of a high-score contest, but the sudden prevalence of editor programs resulted in the cancellation of the contest without ever being formally announced. Imagineer bought the rights for the game, and commissioned id to port the game to the Super Nintendo Entertainment System (SNES) for a US$100,000 advance. The team was busy with the development of Doom, plus their work on Spear of Destiny, and ignored the project for seven or eight months, finally hiring Rebecca Heineman to do the work. She made no progress on the port, however, and the id team members instead spent three weeks frantically learning how to make SNES games and creating the port by March 1993. This version was written in C and compiled in the 65816 assembly language, making use of binary space partitioning rather than raycasting in order to give it speed. Carmack had to resize existing images to fit the SNES resolution. Nintendo insisted on censoring the game in accordance with their policies; this included first making all blood green and then finally removing it, removing Nazi imagery and German voice clips, and replacing enemy dogs