Edward Richtofen/Trivia

General

 * Richtofen developed schizophrenia after touching the M.P.D.
 * Richtofen is the creator of the Wunderwaffe DG-2, the Monkey Bomb, Quantum Entanglement Device and the armoured suit worn by the Panzer Soldat. He also assisted in the creation of the Giant Robots. It is hinted that he created the Ray Gun, as he quotes that it came to him "in a dream" when he receives it from the Mystery Box.
 * Richtofen likes Nikolai, who returned this respect up until Richtofen tricked the celebrities into getting the Vril Generator for him. After that, he was hated by all three.
 * In Origins, Nikolai disliked Richtofen from the beginning for creating the Zombies.
 * Richtofen's weapons of choice are the MP40, the STG-44, the Spectre, G115 Generator the upgraded Crossbow, and sniper rifles in The Giant.
 * His favorite staff is the Staff of Lightning.
 * The Original Richtofen and Original Dempsey have a mutual dislike for each other and hate each other but the Origins versions are shown to be strained friends throughout Call of Duty: Black Ops III.
 * Richtofen despises killing the Hellhounds. Some of his quotes question their merciless natures; also, some of his quotes about Hellhounds may also show that Richtofen likes dogs.
 * He likes potato salad.
 * He has a sister, as he used to crush her Matryoshka Dolls to make her cry.
 * He had begun to hate Samantha and Ludvig Maxis after the latter had not mass-produced the Wunderwaffe DG-2 because he was being distracted by Sophia.

Call of Duty: World at War

 * Under Richtofen's right eye is a scar. This scar is not seen in Shi No Numa.
 * When the first letters of each sentence in the four original characters biographies (from top to bottom) are put together, a message spelling out "THEDRWANTSTHEULTIMATEPOWERBASTARD" comes to light, referring and foreshadowing to Richtofen's actions during Moon.

Call of Duty: Black Ops

 * Sometimes when Pack-a-Punching, he hums the Double Tap jingle.
 * When subtitles are turned on, Richtofen's name is misspelled as "Richtofan" in the Kino der Toten cutscene on the Xbox 360 and PC versions.
 * Occasionally the player can hear the voices whispering in Richtofen's head.
 * In Shangri-La and Moon, he still possesses the Golden Rod, if the Original Characters Trapped Easter egg has been completed.
 * Richtofen refers to the P.E.S. as "pies".
 * In the Kino der Toten Trailer, Richtofen's swastika is on his right arm when he fires the China Lake.
 * In multiple multiplayer maps and campaign levels, a book with his name on it can be found.
 * According to one of his quotes in Kino der Toten, he has an MP3 player.

Call of Duty: Black Ops II

 * He can be heard in Nuketown Zombies as the rounds go by, addressing various parts of the Richtofen's Grand Scheme. By round 25, it will be completed and he will gain control of the zombies.
 * He is the Demonic Announcer in Cell Block in the Italian, French, and German editions of the Uprising DLC.
 * In the trailer for Origins, two vials of blood are seen on Richtofen's player model, one has Salvatore "Sal" DeLuca's serial number written on it, "386A", the other vial has Michael "Finn" O'Leary's serial number, "481B". He continues to carry these two vials in Black Ops III.
 * In one of the ciphers in Origins, it is said that Richtofen studied at Heidelberg University. It is unknown if he shares the same background with the original Richtofen.

Call of Duty: Black Ops III

 * In the reveal trailer for The Giant, the original timeline Richtofen is missing the swastika on his sleeve.
 * This original Richtofen is also missing his scar under his right eye.
 * Richtofen makes an appearance in Shadows of Evil after the Easter egg is finished.
 * In Der Eisendrache, Richtofen will mention his favorite number is 3.
 * In the ending cutscene in Der Eisendrache, It is evident that Richtofen seems to no longer hate Dempsey as after Dempsey euthanized his Original timeline version Richtofen briefly comforted him showing that despite the long hatred throughout the series in both timelines, Richtofen has let go of these feelings along with Dempsey to achieve a common goal.
 * However in Zetsubou No Shima, Dempsey and Richtofen mock each other in a joking manner a few times and Dempsey is still suspicious of Richtofen, showing that the two don't hate each other, but rather do not think too highly of one another.
 * In Der Eisendrache, Richtofen's character model now has a small cut under his right eye, similar to the original timeline Richtofen.
 * Richtofen has a belt buckle with his name on it. This is not seen in Origins.
 * Richtofen appears to suffer from insomnia, as he mentions in Gorod Krovi that he forgets the last time he slept.