Ran the Gauntlet(50G)- Defeat the Level 25 Boss of the Skills Trainer Gauntlet.
This is the hardest achievement in the game. While attempting this I wish you the best of luck.

*Tip* Set difficulty to rookie.

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Boss Level 1:
Hurricane Kicking. Make sure your aiming is in the middle, and your kick is at full power.

Boss Level 2:
Entourage Running. Run up the middle without using the sprint button. Once near the end of the field sprint out of the group up the side.

If you are missing any lives, I suggest you restart.

Boss Level 3:
1v4 Running. Run a S/zig-zag route and then sprint towards the goal.

Boss Level 4:
Area Passing.
DO NOT complete a pass if it's not in the correct zone, you will lose a life. There's no time limit so make sure you take your time with this one,

Boss Level 5:
Super Bowl Press Running.
Run what ever makes it easier for you since it varies from person to person, but i prefer running up the left side.