This article is a stub. Please help the Doom Wiki by expanding it. 2002: A Doom Odyssey maps E1M1-E1M9 E1M1: The Entry E1M2: Helicopter Bay E1M3: The Doomed Lab E1M4: Substation 537A E1M5: Combat Station E1M6: Toxic Treatment Plant E1M7: Service Base E1M8: Paradox E1M9: Lugano Base ZR-X (E1M1-E1M9) E2M1 E2M2 E2M3 E2M4 E2M5 E2M6 E2M7 E2M8 E2M9 E3M1 E3M2 E3M3 E3M4 E3M5 E3M6 E3M7 E3M8 E3M9 E4M1 E4M2 E4M3 E4M4 E4M5 E4M6 E4M7 E4M8 E4M9 Substation537A is the fourth level of Deep into the Code of 2002: A Doom Odyssey megawad. It was created and designed by Kristian Aro. Retrieved from "https://doom.fandom.com/wiki/E1M4:_Substation_537A_(2002:_A_Doom_Odyssey)?oldid=93382" Categories: Stubs 2002: A Doom Odyssey levels Levels by name Community content is available under CC-BY-SA unless otherwise noted.