Unlike the standard FIFA 06, this version features only national teams (72 total) and focuses entirely on the UEFA qualification process for the 2006 World Cup.
You can only qualify for the World Cup; the game does not actually include the tournament finals. FIFA 06 Road To FIFA World Cup [Jtag/RGH]
For a more comprehensive look at the gameplay, you can watch modern retrospectives on YouTube which highlight how the game feels 20 years later. Unlike the standard FIFA 06, this version features