Cheat mode:
Press (Turbo), (Jump), and (Pass) to change the icons below the helmets on the versus screen. The numbers in the following list indicate the number of times each button is pressed. After the icons have been changed, press the joystick/gamepad in the indicated direction to enable the code. The name of the code and a sound will confirm correct code entry. Example, to enter 1-2-3 Left, press (Turbo),
(Jump) two times, (Pass) three times, Left.

Result: Code

Power-up teammates: 2-3-3 Up
Fast passes: 2-5-0 Left
Play on grass field: 3-0-0 Up
Grass field: 3-0-0 Up
Asphalt field: 3-0-1 Up
Dirt field: 3-0-2 Up
Astroturf field: 3-0-3 Up
Snow field: 3-0-4 Up
Team tiny players: 3-1-0 Right
Power-up blockers: 3-1-2 Left
Power-up offense: 3-1-2 Up
Target receiver no hits: 3-2-1 Down
No head: 3-2-1 Left
Invisible receiver highlight: 3-3-3 Left
Cancel always QB or receiver: 3-3-3 Up
Invisible quarterback: 3-4-2 Left
No interceptions: 3-4-4 Up
Power-up defense: 4-2-1 Up
No random fumbles: 4-2-3 Down
Invisible: 4-3-3 Up
Turn off stadium: 5-0-0 Left
Day stadium: 5-0-1 Down
City stadium: 5-0-1 Left
Old day stadium: 5-0-1 Up
Night stadium: 5-0-2 Down
Old night stadium: 5-0-2 Up
Snow stadium: 5-0-3 Down
Roman stadium: 5-0-3 Left
Old snow stadium: 5-0-3 Up
Infinite turbo: 5-1-4 Up
Weather: snow: 5-2-5 Down
Weather: rain: 5-5-5 Right
Show field goal %: 0-0-1 Down
Show punt hang meter: 0-0-1 Right
Late hits: 0-1-0 Up
Night game: 0-2-2 Right
Fog on: 0-3-0 Down
Fast turbo running: 0-3-2 Left
Huge head: 0-4-0 Up
Thick fog on: 0-4-1 Down
Super blitzing: 0-4-5 Up
Big football: 0-5-0 Right
Use team plays: 1-0-0 Up
Arizona Cardinals' playbook: 1-0-1 Left
POV uniform: 1-1-1 Right
Hide receiver name: 1-0-2 Right
Chicago Bears' playbook: 1-1-0 Left
Green Bay Packers playbook: 1-2-2 Left
Super field goals: 1-2-3 Left
Headless team: 1-2-3 Right
Team big players: 1-4-1 Right
No punting: 1-5-1 Up
Big head: 2-0-0 Right
Team big heads: 2-0-3 Right
No first downs: 2-1-0 Up
Allow stepping out of bounds: 2-1-1 Left
Weather: clear: 2-1-2 Left
Always QB on multi-player: 2-2-2 Left
Always receiver: 2-2-2 Right