Unverified. To achieve achievements do the following:

Select every single team in Franchise mode and just simply sim everything. Throughout the entire season anyone who breaks "GAME" and "SEASON" record achievements will count for you they get unlocked.

Also, if you sim seasons your overall madden level will go up anywhere to 2 - 3 levels a season. Once the Superbowl and Pro Bowl are done just exit and go to "Play Now" Select no for save and then restart. You can easily get to Madden level 40 in about two hours and unlock almost every achievement. This also works for your SuperStar character.