Enter these codes in the game's CHEAT menu.
MRSHMLLW - Fat Players
TTHPCK - Thin players
SPRTRBMD - Faster running
FRRSTGMP - Slowmotion mode
SCLLYMLDR - "Alien" stadium
BTTRFNGRS - Always fumble
STCKYBLL - No fumbles
BGMNY - Big coin toss coins
BCHBLL - Super-sized football
XTRTMS - Cheat teams
DBLDWNS - Double downs
XTRVLTG - Electric football
FLBBR - Flubber ball
HSNFR - Fire players
PPCRNRTRNS - Loads of land mines on the field
PNBLL - Pinball players
RGBY - Rugby mode
SLPNSLD - Super-slippery mode
PWRKCKR - Super kickers
TRBMN - Unlimited turbos
HSPTL - Increased injuries
RCQTBLL - Raquetball Football mode