Here is the full list of all 6 FIFA 06: Road to FIFA World Cup achievements worth 1,000 gamerscore.
Won a League tournament created in the Create Tournament Mode
Won a Knockout tournament created in the Create Tournament Mode
Won a match playing on Perfect difficulty level
Qualified for the FIFA World Cup in the Road to FIFA World Cup mode
Won the World Masters tournament in the Road to FIFA World Cup mode
Won the International Open in the Road to FIFA World Cup mode