Retroactive Continuity
The so-called "Continuity Two" of the Tomb Raider series (Legend onwards) has involved a retcon of the original Lara Croft story (TR1-6).
Retroactive continuity is the deliberate changing of previously established facts in a work of serial fiction.[1] The change is informally referred to as a "retcon," and producing a retcon is called "retconning".
Retcons are common in comic books, especially those of large, long-established publishing houses such as Marvel Comics and DC Comics, because of the lengthy history of many series and the number of independent authors contributing to their development. Retconning also occurs in video games, soap operas, movie sequels, professional wrestling, radio series, series of novels, and any other type of episodic fiction. It is also used in roleplaying, when the game master feels it necessary to maintain consistency in the story or to fix significant mistakes that occurred during play, often under the synonymous (in this context) term "reality shift". Retconning also resembles the real-life occurrence of historical revisionism, where newly discovered information or a reinterpretation of existing information or a change in ideology inspires the rewriting of histories.