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Not to be confused with its precursor Back to Saturn X: Episode 1
BSTX Episode 2 Main Menu 1
BTSX Episode 2 Main Menu 2

Back to Saturn X: Episode 2, abbreviated in-game as BTSX: Episode 2, informally known as BTSX 2, sometimes elongated to Back to Saturn X: Episode 2: "Big Towers," Says Xaser or Back to Saturn X: Episode 2: Tower in the Fountain of Sparks and possibly incorrectly referred to as BTSX or Back to Saturn X is a mod for Doom II devolved by BTSX Team and released on September 1st, 2014.

It is a sequel to Back to Saturn X: Episode 1 with the same graphical changes as the last, but featuring a brand new soundtrack.

Although not developed, licensed, or published by id Software, it is officially supported by them, as it was released as a free add-on for a 2019 re-release of The Ultimate Doom and Doom II/The Master Levels, alongside its precursor Back to Saturn X: Episode 1, on June 26th, 2020.

It has a planned sequel named Back to Saturn X: Episode 3.

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