8. Civilization 4

Sid Meier's classic Civilization series is one of the defining strategy franchises ever to grace a computer screen. Every Civ title offers huge amounts of content, with all games and maps offering some kind of randomly generated challenge each and every time. Whilst the fifth core entry to the series was a more accessible and streamlined version of the game, it was number four that arguably offered the deepest and most complex strategy that the series has yet to offer. It is thus that it is rife to put on a list of lengthy games.







