The logo for Civilization, a famous series of turn-based strategy video games that was developed by Canadian-born American video game developer Sid Meier and first released in 1991. The series has had six installments and numerous expansion packs, DLCs and spin-offs.
Some civilizations and leaders from the Civilization series;*
Civilization (1991):
China: Puyi
Russia: Boris Savinkov
Civilization II (1996):
America: Abraham Lincoln and Elizabeth Gurley Flynn
Russia: Alexander Kerensky and Catherine the Great
Civilization III (2001, 2002 and 2003):
America: Theodore Roosevelt
Canada: Mackenzie King
China: Puyi
Italy: Victor Emmanuel II
Civilization IV (2005, 2006 and 2007):
America: George Washington, Abraham Lincoln and Douglas MacArthur
Canada: Mackenzie King
China: Chen Jiongming, Puyi and Qin Shi Huang
England: Elizabeth, Victoria and Edward VIII
Germany: Bismarck, Frederick and Wilhelm II
Italy: Victor Emmanuel II
Russia: Peter, Catherine and Boris Savinkov
Civilization V (2010, 2012 and 2013):
Civilization VI (2016, 2018 and 2019):
Australia: Stanley Bruce
Austria: Karl I
Italy: Giovanni Gronchi
*=These are the leaders that are different from OTL's Civilization series.