If you work in games retail, it will be hard to forget September 2013.
Grand Theft Auto V launched to phenomenal critical acclaim, resulting in snaking queues outside stores and a level of commercial success that no other boxed game has attained before or since.
A few weeks after the game launched, Rockstar released a dedicated online mode called GTA Online. The open-world experience had some initial launch issues, but has since gone on to big success. The mode has been regularly updated and subsequently ported across to PS4, Xbox One and PC.