tee hee In Shi No Numa, a radio message can be heard in the starting room by turning on three radios. The message is: "R-4808n 37 14 06 115 48 40. I hope that you are receiving this transmission Peter, if not then all has already been lost. You must know by now that we failed to contain the Asylum and we had to move the experiment here. Location: the numbers will guide you. The giant must remain (static) at all costs, repeat, Der Riese must remain (static) at all costs. The DG experiments continues. You're our only advantage now. Find Doctor Richtofen (static is in this word, but it is still audible) and Doctor Max, they may know what's going on. The use of 115 is dangerous at best. I'm not sure how much longer we can continue here. We've lost most of our best people. I hope you get this. I hope I happen to be there too but I'm almost out of hope. 60 54 06.96 101 55 44.94." — Shi No Numa radio message. The numbers are the coordinates of Tunguska (end of message) and Area 51 (beginning of message). Dr. Max is Dr. Maxis. "DG experiments" is a reference to the Wunderwaffe DG-2. The asylum is the setting of the second level, Verruckt. 115 is element 115, an element found in meteors and known to power the Wunderwaffe. A meteor containing 115 is shown in the map Shi No Numa outside one of the swamp areas. A meteor can also be seen on the moon in Der Riese and Ascension. Kino der Toten contains three fragments of a meteor that, when activated, play the musical easter egg, rightfully named 115. Peter is secretly an American agent and Tank was sent to recover him. In Der Riese, the creation of the Zombies and Hellhounds is explained. Dr. Maxis was testing Zombies for the government project christened "Der Riese" or "The Giant". He was testing teleporters by sending people and/or dogs through them. They reappeared at the mainframe, but had been turned into Zombies. He tried to control the Zombies, but the problem was that they would always go berserk and try to kill him, resulting in their death. All of these experiments were done with his assistant, Dr. Edward Richtofen. When he used his daughter Samantha's dog, Fluffy, as a teleporter test subject, he accidentally created the first hellhound. The dog was teleported, but like the rest of the subjects, she reappeared at the mainframe zombified. When Samantha came running in and started questioning her dad about her dog, Richtofen left the room. Richtofen then betrayed him by locking him and his daughter in the room with the hellhound, which was originally believed to have killed them. Richtofen let loose the zombies on the factory, as on another radio message the player can hear screams and the sounds of Zombies moaning and attacking. Another radio message explains how hellhounds increased in quantity; in it, Maxis talks to his daughter about Fluffy's pregnancy. In Call of Duty: Black Ops it is revealed that he and the other three playable characters survived the events at Der Riese and time-traveled to a Nazi theater, where they continue to fight Zombies.
In the introduction to Kino der Toten, Richtofen reveals that he knows much more about the energy created by 115, and that he was excited to learn that it was also capable of time travel. He seems unconcerned that he and his partners have been teleported to Nazi Germany in an unknown year.
Documents from vbush detail more of the story. They reveal that the ray gun was created by Maxis while the Wunderwaffe and the Monkey Bomb were created by Richtofen. As the experiments with 115 continued, Maxis noted that Richtofen had started acting increasingly insane and that he feared for his and Samantha's lives and regretted inviting him to join the group. Maxis also wrote that he and Sophia were attracted to each other. One of the other documents also reveals that Tank, Nikolai, and Takeo had their memories wiped by 115 and were being observed by Richtofen. It is also pretty apparent from the loading screen for Nacht der Untoten in Black Ops that someone (identity unknown) tried to use Soviet memory modification technology to try and control the zombies.
Sometime prior to Ascension, Yuri Kravcheski was transferred to work on sending monkeys into space, much to his dismay. His transfer was caused by his superior, Gersch, who he holds a grudge against. As the radio messages progress, Yuri notices the teddy bear and the Matryoshka dolls and wonders how a child could be let into the station. It is assumed Samantha Maxis brought these items and that she then drives Yuri insane. Yuri, in his state of insanity, finishes the Gersch Device and has Gersch activate it, letting in the zombies and seemingly killing Gersch. Yuri soon realizes his mistake and is heard screaming at the end of the last recording.
After the events of Kino der Toten, the main characters somehow reach the abandoned Soviet launch pad in Ascension. When the game starts, the four are landing in the starting room on the lunar lander as the color turns to black and white (which the characters acknowledge). The characters then hear Gersch, who tells them that the mechanism must be repaired. He is referring to the Kassimir Mechanism, which must be repaired by completing different tasks. After all of the tasks are completed and the mechanism is repaired, Gersch is free and gives the players 90-second death machines.
While the events of Ascension are occurring in Russia, the events of "Five" are also unfolding in the Pentagon. While John F. Kennedy, Robert McNamara, Fidel Castro, and Richard Nixon are negotiating, zombies break into the Pentagon with only the four of them left to fight them. While fighting, they call the characters in Ascension using three red telephones spread across the Pentagon.
HOPE THAT HELPED