At the Start Game screen, in either Pre-Season or Season Play press L1, R1, L2, R2. This will bring you to the easter egg screen where you enter codes for the game. To delete an easter egg, enter the code "DOC".
ASSASSIN:
Injuries up
ATOMIC BOMB:
Explosion on hard hits
BAZOOKA:
Quarterback has stronger arm
BIG GIRLS:
Cheerleaders are bigger
BIG STARS:
Better players are bigger
BLASTERS:
More time to pop a receiver and get the ball out
BLIND REF:
Referee misses calls
BLIZZARD:
Lots of snow
BO KNOWS:
Shoulder charge
BRITTLE:
More injuries
BROADWAY JOE:
Quarterback is slower but more accurate
BUSY REF:
Referee calls more penalties
BUTKAS:
Defense hits harder
CREDITS:
View the game's credits
CRUNCHY:
Hits are louder
DARK NIGHT:
Darker in stadium
DEFENSE:
Better defense
DEMPSEY:
Field-goal range increases
DERVISH:
Spins are more effective
DOC:
Players don't get hurt
ELECTRIC FB:
Players twitch
EQUALIZER:
Most players are equal
FLEA CIRCUS:
Players are really small
FRIDGE:
Players are bigger
FROG:
Players jump higher
GB SPEED:
Play is much faster
GD CHALLENGE:
Computer is harder
GENIUS:
Computer is smarter
GLOVES:
Players catch more passes
GOLIATH:
Players are bigger and sound like monsters
HANG TIME:
Punts and kickoffs stay in the air longer
HATCHET:
Forearm shiver juiced
HOGS:
Offensive line blocks better
HOME COOKING:
Home team has no call-pass interference or personal fouls
ICE SKATES:
Players slip around
INFAMOUS POP UPS:
Receivers pop the ball very high when hit
INJURIES UP:
More injuries
INJURIES DOWN:
Fewer injuries
JUGGLER:
One handed catches are less effective
JUICE:
Speed burst is better
KARATE:
Forearm shiver becomes karate chop
KRAIG:
More fumbles
LONG JUMP:
Players dive further
LOUD MOUTH:
Commentator is louder
MANDARICH:
Offensive line is at a disatvantage
NO TIME:
Unlimited time
NYSE:
Swim move is juiced
OFFENSE:
Better offense
OUCH:
If hit in the air....... Ouch!
PANCAKE:
Blockers knock over defenders more frequently
PINBALL:
Stronger forearm shiver
PISTON:
Jackhammer off a stiff arm
REJECTION:
Defensive players jump higher
SAYERS:
Opposing defensive players miss tackles
SCRAMBLER:
Quarterback moves faster
SHOUT:
Crowd is louder
SLO MO:
Play is slower
SQUALL:
More wind in rain
STEROIDS:
Recover specials faster and computer players are faster