CheatCodes.com has all the official NFL GameDay PSX cheats to unlock everything. If you know of any that we don't have, please let us know.
All published and official codes as of Thursday May 23, 2013 for NFL GameDay are shown below.
Hold L1 + L2 + R1 + R2 as the game begins loading. Then all winning, losing, and Super Bowl screens may be viewed before the main menu is displayed.
At the substitutions screen, press Start + Select + L1 + L2 + R1 + R2 to exit a game.
At the main menu, press Select to display the memory card screen. Then, press Select again to display the password screen and enter one of the following case- sensitive codes: Code Result SNAKE Snake teams SKELETON Skeleton teams in Bone Bowl OFFENSE Better offense DEFENSE Better defense PICK.CITY Easy interceptions STEROIDS Quickly perform special moves JUICE Press X while running for speed burst CRUNCH.TIME Harder tackles MAYHEM Players tackled are injured CANNON.ARM Quarterbacks throws bullet passes BIG.BOYS Huge linebackers and linemen URNOTREDE Very difficult computer in one player game STICKUM No fumbles EEGGCODE13 Unknown EEGGCODE14 Unknown EEGGCODE15 Unknown
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