Off-screen plays:
Move to the top left corner of the screen when selecting a play and press Up(2).

Onside kick:
Get a touchdown, then go for two points or a field goal. Immediately after you do one of the conversions, hold X + Square + R1 +Up.

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 D-pad 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(2), Pass(3), Left.

Result: Code:

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