Football Manager was a hit that broke records as one of the five fastest-selling PC games ever when it was released in November 2004.

Since then, the series putting players in charge of running a football club has continued to grow, with last year’s game played by six million people.

But it has changed dramatically since the 2000s. Little circles bouncing about on a green rectangle have become a fully-fledged 3D simulation, which gamers often boast (or bemoan) getting lost in for hundreds of hours each year.

With the release of the 20th game in the Football Manager series, the BBC spoke to Sports Interactive, the studio behind the game, about how the fan favourite has evolved.

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