E1M4: Jupiter Planetary Control Center (The Lost Episodes of Doom)

E1M4: Jupiter Planetary Control Center is the fourth map of Massacre on Callisto, which is the first episode of The Lost Episodes of Doom. It was designed by Christen David Klie and previously released as a map in and later in. According to the designer's notes in the book, it was released as CHRISK14.WAD in the first place. This map is something special, for it is really tough to gain 100% kills at the end-of-level tally. In the room with the Yellow keycard the player have to use a switch to rise a small bridge to get the key. In the remaining pits left and right from the bridge stand 3 deaf Cyberdemons at every side, which the player have not to kill to exit the level, but to gain 100% kills. If ythe player drop from the bridge the floor does damage to the him until he die. There is no way out of the pits. All three keys are used.