E1M3: Jovian Deuterium Plant is the third map of Massacre on Callisto, which is the first episode of The Lost Episodes of Doom. It was designed by Christen David "Chris" Klie and previously released as a map in CHRIS_E1.WADdei fdjdffjdkdsjdslndn kfdnjwo uehf isndnj jsdn skm js sjwdsn nsjsdbsansmamns sams de ja men den siger msix n nxsjdbedcjdw and later in CHRISK.WADdei fdjdffjdkdsjdslndn kfdnjwo uehf isndnj jsdn skm js sjwdsn nsjsdbsansmamns sams de ja men den siger msix n nxsjdbedcjdw. According to the designer's notes in the book, it was released as CHRISK13.WAD in the first place. This map can easily confuse the player because it contains a room with various hidden switches, some of which are essential for the forthcoming of the player. All three keys are used; the blue and yellow are