Alternate history

Various anime productions have also used the genre:

Zipang (based on a manga of the same name), involves a modern Aegis class destroyer of the Japan Maritime Self-Defense Force being thrown back in time to the Battle of Midway in 1942. The presence of the ship and its crew, their advanced technology and knowledge of the future, change the course of World War II and create an alternate timeline.
Code Geass depicts an alternate history in which a western empire known as Britannia has conquered and colonized Japan in a near-future setting.
Konpeki no Kantai (lit. Deep Blue Fleet) depicts a hyper-advanced Japanese navy defeating the United States in World War II. Subsequently, Japan, Britain and the United States join forces to defeat Nazi Germany.
[edit] Role-playing games
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The dramatic possibilities of alternate history provide a diverse genre for exploration in role-playing games. Many games use an alternate historical background for their campaigns. In particular, the fourth edition of GURPS uses a setting containing multiple different alternate histories as its default campaign setting, with the supplement GURPS Infinite Worlds detailing a large number of alternate worlds included in the setting, many of them carryovers from the third-edition GURPS supplements GURPS Alternate Earths and GURPS Alternate Earths II.