[SpideR NY]

"15 Return a Fumble for a Touchdown
Return a Fumble for a Touchdown
This one can be a little tricky. Best way to do this is to turn penalties off and when the computer goes to punt have your guy standing in front and block it. PICK IT UP AND RUN! Also note that if you block a punt and pick it up in the end zone, it does not count as returning a fumble. You have to run it in."

This is false. Just wanted to let you know. I blocked a punt and landed on it in the endzone and got the achievement.

Edit: Also for the forced fumble achievement (as someone else has said) too tall works awesome!