Ununpentium, nicknamed Element 115, is the temporary name of a synthetic superheavy element in the periodic table. It plays a major role in the Nazi Zombies back-story. According to the radio messages in Shi No Numa and Der Riese and by character quotes, it is extensively used by Group 935. In the Nazi Zombies storyline, however, Element 115 is harvested from meteorites that have fallen into warring powers' territory. One of these meteors that can be seen by the player is found in Shi No Numa, and until the release of Black Ops this was the only meteor to be found in the maps. In Kino der Toten there are three meteor fragments that can be found. These can be activated by pressing the use button while looking at them. After all three of the meteor fragments are activated, the song "115" by Elena Siegman starts to play. Said meteors are red in colore, emit strange noises and have electrical pulses flickering across their surfaces. Shooting them will bring certain quotes by the characters dealing with the rock. Element 115 has been found in Der Riese, Shi No Numa, and Tunguska. Three more meteors can be found in Call of the Dead, which when activated, plays the song "Not Ready To Die" by Avenged Sevenfold, and again three meteors can be found in Shangri-La activating the song Pareidolia. Element 115 is also found across the mines in Shangri-La. The mines of 115 were believed to create the zombies in Shangri-La. Also when you go back in time in Shangri-La you see a huge metor of 115 ontop of the temple.
Element 115 was used to create the zombies as one of its side effects was the reanimation of dead cells. The zombies were to be used as super-soldiers by the Nazis. After creating them, Nazis realized that they were too uncontrollable and would lead to mankind's destruction. The Ray Gun, the Pack-a-Punch Machine, and the Wunderwaffe DG-2 are all powered by 115, along with the teleporters. Also, the V-R11 has a rotating semi-sphere of glass which has a small fragment of 115. It would appear element 115 can also control the zombies, as the Focusing Stone is a shrunken down meteor that Richtofen claims will let him control the world.