Doom Wiki
Not to be confused with its sequel Back to Saturn X: Episode 2
BTSX- Episode 1 Main Menu

Back to Saturn X: Episode 1, abbreviated in-game as BTSX: Episode 1, informally known as BTSX 1, sometimes elongated to Back to Saturn X: Episode 1: Better Texturing with STARTAN-X, and possibly wrongly referred to as BTSX or Back to Saturn X is a 27 mission mod for Doom II developed by BTSX Team and released on December 10th, 2012. Along with new levels, this mod also boasts new music tracks, textures, and sprites. The goal of the mod is to create a brand-new gameplay experience, while still retaining the gameplay-style of the original Doom II. 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 2019 remasters of The Ultimate Doom and Doom II/The Master Levels, alongside its sequel Back to Saturn X: Episode 2, on June 26th, 2020.


  • MAP01: Back to Saturn X Radio Report (BTSX Episode 1) by Sarah Mancuso (esselfortium) and Richard Frei (Tarnsman)
  • MAP02: Postal Blowfish (BTSX: Episode 1) by Kim Bach (Torn) and esselfortium
  • MAP03: The Room Taking Shape (BTSX: Episode 1) by Paul DeBruyne (skillsaw)
  • MAP04: A Good Flying Bird (BTSX: Episode 1) by esselfortium
  • MAP05: Total Exposure (BTSX: Episode 1) by Walker Wright (Pavera)
  • MAP06: Mix Up The Satellite (BTSX: Episode 1) by Trevor Primmett (iori)
  • MAP07: Metal Mothers (BTSX: Episode 1) by Björn Ostmann (Vader)
  • MAP08: Get Out Of My Stations I (BTSX: Episode 1) (episode hub) by esselfortium
  • MAP09: Some Drilling Implied (BTSX: Episode 1) by esselfortium and Travers Dunne (traversd)
  • MAP10: A Proud And Booming Industry (BTSX: Episode 1) by skillsaw
  • MAP11: The Colossus Crawls West (BTSX: Episode 1) by Edward Cripps (Ed)
  • MAP12: Underground Initiations (BTSX: Episode 1) by traversd and skillsaw
  • MAP13: I'll Replace You With Machines (BTSX: Episode 1) by esselfortium and skillsaw
  • MAP14: Big Chief Chinese Restaurant (BTSX: Episode 1) by Matthew Edwards (Foodles) and esselfortium
  • MAP15: Tricyclic Looper (BTSX: Episode 1) by Brett Harrell (Mechadon)
  • MAP16: Get Out of my Stations II (BTSX: Episode 1) (episode hub) by esselfortium
  • MAP17: Navigating Flood Regions (BTSX: Episode 1) by esselfortium
  • MAP18: Cyclone Utilities (Remember Your Birthday) (BTSX: Episode 1) by Simon Judd (sirjuddington) and esselfortium
  • MAP19: Bingo Pool Hall of Blood (BTSX: Episode 1) by Tarnsman and esselfortium
  • MAP20: U.S. Mustard Company (BTSX: Episode 1) by Matt Cibulas (RottKing)
  • MAP21: Failed Experiments and Trashed Aircraft (BTSX: Episode 1) by Nick Laurent (hobomaster22) and Tarnsman
  • MAP22: Gonna Never Have To Die (BTSX: Episode 1) by RottKing and skillsaw
  • MAP23: Get Out Of My Stations III (BTSX: Episode 1) (episode hub) by esselfortium
  • MAP24: Tough Skin River (BTSX: Episode 1) by Tango
  • MAP25: The Unsinkable Fats Domino (BTSX: Episode 1) by esselfortium
  • MAP31: Optical Hopscotch (BTSX: Episode 1) by skillsaw
  • MAP32: The Hard Way (BTSX: Episode 1) by skillsaw

Category:Community Category:Modifications Franchise