MotoGP 08
50 Achievements
1,000
Xbox 360
Retirement
Finish a Career.
30
How to unlock the Retirement achievement in MotoGP 08 - Definitive Guide
The key word in the description is "finish."
After you complete your first 3 championships for each class, just load up either 125cc or 250cc championship, because these classes have one less race in it than the MotoGP class.
Skip qualifying and practice, just get to the start of the real race. When the race starts, press start and then exit. You will get a DNF (did not finish) but that doesn't matter, because all you have to do is get to the end of the championship, do not have to win or ride a single race.
Just continue getting DNFs until the end, and then start the process again for another championship. It will take about 15 or so minutes doing this trick to get through one championship.
After you complete your first 3 championships for each class, just load up either 125cc or 250cc championship, because these classes have one less race in it than the MotoGP class.
Skip qualifying and practice, just get to the start of the real race. When the race starts, press start and then exit. You will get a DNF (did not finish) but that doesn't matter, because all you have to do is get to the end of the championship, do not have to win or ride a single race.
Just continue getting DNFs until the end, and then start the process again for another championship. It will take about 15 or so minutes doing this trick to get through one championship.