Madden NFL 08

I got this in the same game as attempting the 60yrd run, 80 yrd run and 90yrd pass achievements. Following advice on the three guides for those achievements, I got over 250 yrds in 2 and half minutes of play.
After that I just repeated the proceedure for 90 yrd pass again and again and had over 800 yrds before half time.

(After each conversion kick off and the second controller will allow you to stay still and get tackled. Punt the ball back with controller 2 and when you recieve the ball run back to your own 5yrd line and allow yourself to be tackled. Team 2 in Field Goal block. Team 1 use an ace pass to the x controller and run the rest of the field to the touchdown zone.)

I had turned off the play clock so that I had plenty of time to set up the plays and then when I had enough yrd I could then leave the game sat choosing a play while the clock counted down (and I could make lunch and watch telly). You may be able to supersim to the end of the game but I didn't want to risk it.

Beware that the offense tally will go down as well if you loose yards.

Just for anyone who might still be going for this, use knight0fkh0nshu's method. His might be for getting 200 kick return yards but the same thing will greatly help with this. You play normally while on offense but on defense just continuously go off-sides until the opponent gets within scoring distance. You can keep the clock from going up while your opponent has the ball, maximizing the amount of possession time you have.