Mutant Football League

This achievement is quite easy. For the quickest way to get it, I would suggest playing on Newbie difficulty and using one minute quarters. All you have to do is score once and run the clock down. If for some reason you lose, force close the game and reboot it. This will keep it from saving your progress. I know that this works, because I had to do it once during my playthrough. There are 14 regular season games that must be played (the season is 15 weeks, but one of those is a bye week). Then you have to play 2 play-off games and the Mayhem Bowl. Once you win all 17 of those games, the achievement will pop.

Just to add to gmurda 33's solution: I lost 1 game in my season. I was up 56-0 but lost all of my QBs so I had to forfeit. (Didn't look at this solution beforehand or else I would have quit out.) You can set it to where dead players come back after the play to avoid this happening to you as well. I got every other achievement besides killing 1000 in 1 season.