Championship Manager: Season 03/04 is an updated edition of Championship Manager 4, the famous soccer/football management sim. Eidos released it in November 2003 for Microsoft Windows only.
In addition to the updated data for the 2003/2004 season, this edition includes many improvements to the matches engine: new visual effects, weather conditions, commentaries, and a better AI.
Season 03/04 was the last Championship Manager title developed by Sports Interactive, the original creator of the series. Paul and Oliver Collyer, the founder of Sports Interactive, created the first Championship Manager in 1992 and continued to work on it until 2003. Starting from 2004, Sports Interactive would work on a new series called Football Manager, while Eidos would continue the Championship Manager series until 2011.