Madden NFL 12
36 Achievements
1,000
10-12h
MUT Maniac
Complete 20 MUT Games
40
How to unlock the MUT Maniac achievement in Madden NFL 12 - Definitive Guide
However, it made me play a game before my achievement unlocked, so just go ahead and sim 19 games and play the 20th at one minute quarters. Simple!
*Unlocks after 20th game is completed.*
Unachievable due to server closure
The quick and easy method is to play against the CPU with quarter length set to 1 minute and on rookie difficulty. Play and complete the game. Do this 20 times and the trophy is yours.
You should not have to worry about player cards expiring on you, if you play all 20 games using your starter card set.
Other users have unlocked this trophy by using the methods listed below:
If you supersim your MUT games, remember to earn Ultimate Veteran your next game (game 11) you need to play a full game. After game 11, you can supersim to the 20th game, but to earn MUT Maniac your next game (game 21) you need to play a full game.
Credit to BlackIsraelite
I got the Ultimate Veteran and was disconnected 3 times in 10 games.
From the Main Menu, select Ultimate Team > Play Game > Play Vs. CPU. Change the Quarter Length to 1-Minute and Advance to the game. Do this 20 times to unlock the Ultimate Veteran and MUT Maniac Achievements.
These games can be simulated using SuperSim, however it seems that game 11 must be played to unlock 'Ultimate Veteran' and you will have to play a 21st game to get 'MUT Maniac'.