At the matchup screen, press Turbo (for the first number), Jump (for the second), Pass (for the third), the indicated number of times below followed by the direction to activate the corresponding cheat effect.
CODE WHAT IT DOES
0 0 1 Down Show field goal percentage
0 1 2 Down No CPU assist
0 3 0 Down Fog on
2 3 2 Down Ground fog on
0 4 1 Down Thick fog
3 1 4 Down Computer almost unbeatable
4 2 3 Down No random fumbles
2 0 3 Right Big heads
0 5 0 Down Big football
1 4 1 Right Big players
3 1 0 Right Small players
0 4 0 Up Huge heads
2 5 0 Left Bullet passes
1 0 2 Right Hide name
4 0 4 Left Speed mode
3 1 2 Left Power blockers
4 2 1 Up Power defense
5 1 4 Up Unlimited turbo
1 1 5 Left Random players
3 4 2 Left Super quarter backs
0 4 5 Up Super blitzing
2 1 1 Left Step out of bounds
2 3 3 Up Powered-up team
1 2 3 Left Powered-up FG's
0 2 1 Right Show more field
2 1 0 Up No first downs

Secret Players:
Enter one of the following names & PIN numbers at the 'Enter Name' prompt screen to play as the corresponding players:
NAME    PIN     HIDDEN PLAYER
Mike       3333   Mike Lynch
Gentil    1111    Jim Gentile
Brain     1111    Brain
Forden  1111    Dan Forden
Skull      1111    Skull
Carltn    1111    Headless Guy
Shinok  8337    Shinok
Raiden  3691    Raiden
Thug     1111    ?
Van        1234    ?
Turmell 0322    Mark Turmell
Sal         0201    Sal Divita
Jason    3141    Jason Skiles
Jenifr     3333    Jennifer Hedrick
Daniel    0604    Dan Thompson
Japple   6660    Jeff Johnson
Root      6000    John Root
Luis       3333    Luis Mangubat

Fat Players:
Pause the game & press Up, Up, Left, Left, Right, Right, Down, Down.

True Ending For Season Mode:
To obtain the true ending for Season Mode you must beat Season Mode with a rating of 90.0 or higher.