Football Manager 2005, known as Worldwide Soccer Manager 2005 in North America, is a football management simulation video game for PC Windows and Mac developed by Sports Interactive and published by Sega. It is the inaugural entry in the new Football Manager series, and was succeeded by Football Manager 2006. Commonly known as FM 2005, it competed directly with Championship Manager 5, the severely delayed and widely slated effort from Eidos-funded Beautiful Game Studios. It became the fifth fastest-selling PC game of all time at the time according to Chart-Track as well as the fastest selling game from Sega Europe at the time. The Macintosh version of the game came on the same dual format disk as the Windows version, so its sales were also included. This was the first game from Sports Interactive that was published in North America. Development Tensions grew between Sports Interactive and their publisher Eidos Interactive during the troubled development of Championship Manager 4. SI feared that they were about to be replaced, so they prepared for a split. Later it would turn out to be a misunderstanding. SI did redeem themselves with the season update Championship Manager 03/04, where they got things to what they wanted CM4 to be, but the mutual decision to separate had already been announced before the release of CM4. On 12 February 2004, after splitting from publishers Eidos Interactive, it was announced that Sports Interactive, producers of the Championship Manager games, had acquired the "Football Manager" brand and would henceforth release their games under that name, whilst the Championship Manager series would go on, but no longer be related to Sports Interactive. Sports Interactive retained the rights to the code and all data from Championship Manager up until the season update 03/04 and based Football Manager 2005 on that. Gameplay Football Manager 2005 compared to the previous managing game from Sports Interactive, Championship Manager 03/04, included an updated user interface, a refined game engine, updated database and competition rules, pre- and post-match information, international player news, cup summary news, 2D clips from agents, coach reports on squads, job centre for non-playing positions, mutual contract termination, enhanced player loan options, manager "mind games" and various other features. Copyright issues Due to various copyright disputes and restrictions certain alterations had to be made to the game data which took away some of the famous realism known from Sports Interactive and their