Enter the these cheats by going to the Easter Egg menu and type in:

Big Hits Louder noises
Big Balls Large football
Hangtime Punts hang in the air longer
Invisible Invisible players
Blinders No penalties
Bunyon Big players
Even Teams Makes all players equal
GD Challenge Hidden Difficulty level
Stickem Great hands for receivers
Swimmers Swim move juiced
Weak Quick fatigue
Pole axe Forearm is juiced
Slideshow See cheerleaders after a game

codes below courtesy of Jordan Bledsoe and Brian Ricks
CREDITS shows game's credits
EVEN TEAMS both teams are evenly matched
HAMSTRUNG blow a hamstring after using speed burst.
WEAK bad coverage
BLINDERS no penalties
STEEL LEG kicks further
PRIME TIME more celebrations
TELE TUMMY have T.V. on players chest
ROCKET MAN longest dives
BOBO Players last names are all BoBo
HOOPS players last names are all last names of basketball players
FLEA CIRCUS tiny players
PLAYING CARDS 2d players
COFFEE BREAK faster game speed
Puppets players have strings attached
Stamina no fatigue