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Anachronistic Homeland
Released in March 1991, Street Fighter II depicting Zangief as hailing from the Union of Soviet Socialist Republics (U.S.S.R.). This made perfect sense, as the U.S.S.R. would not be dissolved until December of that year.
However, Street Fighter Alpha 2, which was released in 1996 but takes place before SFII, indicates that Zangief's country of origin is Russia. The country would still be known as U.S.S.R. during the period in which the game is set.
Background Cameos Plus Alpha
SFA2: Strider can be seen in Ken's stage, wearing his original outfit and holding a teddy bear (he tosses the bear into the air and catches it whenever a super is landed). A popular legend goes that this appearance is a tribute to one of Capcom's programmers. This mystery man was under immense pressure to make the NEC SuperGrafx port of Strider the "definitive" version, and killed himself. The SuperGrafx version of Strider was never released.
That's Some Pretty Anal Censorship
Due to Nintendo's censorship rules during the 90s, Sodom is renamed as "Katana" in the U.S. versions of all games that he appears in on their home consoles released during this time period.