Cheat mode:
Complete the Madden Challenge, then enter one of the codes:

Result - Code:

1972 Raiders - 32767
1972 Steelers - LEARNTOSWIM
1976 Patriots - 10MOREMIN
1976 Raiders - TONSOFMEAT
1981 Chargers - DRBENWAY
1981 Dolphins - 3000
1985 Bears - ONELINECHNGE
1985 Dolphins - CTHULHU
1986 Broncos - MILKBAR
1986 Browns - FUNKENSTEIN
1988 49ers - COSMICSLOP
1988 Bengals - GAMMALITE
1990 Bills - CNOTES
1990 Giants - ALTXY
1992 Bills - BEENLIKETHAT
1992 Oilers - FLUFFY
1995 Colts - GREASY
1995 Steelers - STILLERS
1997 Broncos - NUMINOUS
1997 Packers - HUGECHICKIN
20 yards for a first down - FIRSTIS20
All 60s team - MOJO
All 70s team - SIDEBURNS
All 80's team - TRICKLEDOWN
Ball camera - BTHEBALL
Bonus All-Madden team - TEAMMADDEN
Bonus Centurian team - PHALANX
Bonus Clown team - KILLERJOKE
Bonus EA Sports team - WEARETHEGAME
Bonus Industrials team - INTHEFUTURE
Bonus Marshall's Fantasy team - COWBOYS
Bonus Mummies team - THOTH
Bonus Nile Hi stadium - VALLEYOKINGS
Bonus Sugar Buzz team - SNAPTACLEPNT
Bonus Tiburon team - SHARKATTACK
Bonus Toy Makers (Nutcrackers) team - SPIRTOFSHOP
NFL Millennium team - 1900
Curved space time - QUANTUM
David vs. Goliath mode - QUARKANDSTAR
Electric sidelines - CHAOS
Electric sidelines - OLDSPARKY
Floating heads - EXISTENIAL
Fumbles - HANDSOFLARD
Hidden 4th And Incas stadium - TENOCHTITLAN
Hidden Alpha Blitz Stadium - PANCAKES
Hidden Dodge City stadium - WILDWEST
Hidden EA Sports stadium - ITSINTHEGAME
Hidden Savage Field stadium - PCBS
Hidden Tiburon Bros. stadium - SIDESHOW
Hidden Tiburon stadium - WEPUTITHERE
Hidden Xmas Rush stadium - XMASGIFT
More fumbles - ROLLERGIRL
More injuries - PAINFUL
More interceptions - PICKEDOFF
More speed - NO2
No fumbles - MAGANASAVE
No interceptions - NOPICKS
Perfect passes - QBINTHECLUB
Player fatigue quickly - FINALBUILD
Players harder to tackle - WIMPBALL
Stiff arm - SMACKDOWN
Super jumps - AIRMADDEN
Super jumps - MOONBALL
Super speed burst - PHOTON
Team makes fewer penalties - REFISBLIND
Tiberium stadium - SAMEASITEVER