Back to Saturn X Episode 2: Tower in the Fountain of Sparks

Back to Saturn X is a series of megawads for Doom II created by the Back to Saturn X Team, it features an exclusive texture set, original music, and a new palette and colormap.

Song and album titles from Guided by Voices provide the title, episode names, and map names. Titles and song lyrics are incorporated into the text screens as well.

The second episode was beta-released on 1 September, 2014, with another twenty-two levels, a secret level, four episode hubs and an ending screen. It received one of the 2014 Cacowards. Its final version was released on August 14, 2020.

On August 14, 2020, Episode 2 was added to the list of official add-ons for the 2019 re-release of Doom II. This curated version replaces all the Guided by Voices-derived level names and its title is reduced to the acronym "BTSX Episode 2". The title screen was changed accordingly, and jokingly changes the title to "Big Towers, Says Xaser".