|To obtain this achievement, you will need to defeat all 41 fighters in a single play through. In the latter stages of your career you don't have the option to bypass any fighters. However once you get into the second tier of boxers at the beginning you do have the option to skip a few boxers, so be cautious not to skip any. If you are playing on Champion difficulty I would suggest not skipping any of the fighters as the extra training is helpful.|
This must be done in career on any difficult, in one single play through.