Hidden stadiums
Choose the "Stadium Select" option on the team selection screen. Then, hold L2 + R2 until the bottom of the column with the various bowl stadiums is selected. Repeat this to eventually get the bowl stadiums and some pro stadiums.
Submitted by Jeremy Temple

AT THE MAIN MENU,SELECT GAME OPTIONS, THEN SELECT SECRET CODES AT THE NEXT SCREEN. AT THE SECERT SCREEN, SPELL OUT THE CHEAT YOU WANT.
Submitted by Austin Bean

All exhibition mode stadiums STADSGALORE
Maximum recruiting points STAFFUP
Super stats team UNSTOPPABLE
Maximum attribute points BLUECHIP
Receivers always catch the ball GIMMEDABALL
Defense always intercepts PIXGALORE
Defense always tackles BRICKWALL
Extra long kicks ICBM
Faster game play SCRAMBLE
Faster daylight effects TIMEFLIES
Knock down referee for 1 point BADCALL
Change title to NCAA 1900 Y2K
Wind at maximum SAFETY
Complete poll CONTROVERSY
View CPU plays MINDREADER
View entire rankings CONTROVERSEY
View introduction sequence BIGSCREEN
1946 Notre Dame team GOLDPAINT
1947 Army team INSIDENOUTSIDE
1957 Notre Dame team STREAKOVER
1959 LSU team RIGHTTHISTIME
1959 Mississippi team HEYREB
1962 USC team FIGHTFORTROY
1962 Wisconsin team BUCKY
1965 Michigan State team BIGGREEN
1965 UCLA team REVENGE
1966 Michigan State team NEEDAWIN
1966 Notre Dame team TAKETHETIE
1967 USC team WHITEHORSE
1967 UCLA team PRESSBOX
1968 Ohio State team 5TITLES
1968 USC team NICERUN
1969 Arkansas team WOOPIGSOOEY
1969 Texas team TEXASFIGHT
1970 Ohio State team BRUTUS
1970 Stanford team MVPQB
1971 Nebraska team GAMEOFCENTURY
1971 Oklahoma team SCHOONER
1973 Alabama team PLAYTHEPASS
1973 Michigan team RUNNERUP
1973 Notre Dame team GUTSYCALL
1973 Ohio State team WINNINGVOTE
1974 Notre Dame team LOSTLEAD
1974 USC team RALLY
1975 Arizona State team DEJAVU
1975 Nebraska team HERBIE
1976 Georgia team HEDGES
1976 Pittsburgh team RUSHTD
1978 Alabama team GOALLINESTAND
1978 Penn State team SHOULDAPASSED
1979 Ohio State team JUSTSHORT
1979 USC team MVPRUN
1981 Clemson team TOUCHTHEROCK
1981 North Carolina team NOTHINGFINER
1982 Cal team THEPLAY
1982 Georgia team SICEMDAWGS
1982 Penn State team LIONPRIDE
1982 Stanford team TROMBONE
1983 Miami team KNOCKITDOWN
1983 Nebraska team GOFOR2
1984 Boston College team MIRACLE
1984 Miami team BADLUCK
1985 Alabama team BLOCKTHATKICK
1985 Auburn team SMARTBACK
1985 Oklahoma team UPSETLIONS
1985 Penn State team SOONERLATER
1986 Penn State team LINEBACKERINT
1986 Miami team FATIGUES
1987 Miami team MONSTERD
1987 Oklahoma team SLOWSTART
1988 Notre Dame team LEPRECHAUN
1988 UCLA team LBBRUINS
1988 USC team TROJANWAR
1988 West Virginia team HURTQB
1989 Alabama team TOOMUCHD
1989 Colorado team MISSEDCHANCES
1989 Notre Dame team LIFTOFF
1991 Miami team SHUTOUT
1991 Michigan team NICEPOSE
1991 Nebraska team HITTHEWEIGHTS
1991 Washington team WILDDOGS
1992 Alabama team REALMENPLAYZONE
1992 Miami team TOOTALENTED
1993 Florida State team TOMAHAWK
1993 Nebraska team REFUSELOSE
1994 Miami team RUNOUTSIDE
1994 Nebraska team STEAMROLLER
1994 Oregon team GREENGANG
1994 Penn State team ALMOSTNO.1
1996 Florida team PUTINLARRY
1996 Florida State team GETTHEQB
1997 Washington State team TURNOVER
1997 Nebraska team CORNFED
1997 Michigan team SPLITVOTE
1997 Tennessee team SMOKEY
All Tiburon team LASERBEAMS
All EA Sports team INTHEGAME
Submitted by Austin Bean & James White & jboyd_2 & Jeremy Temple

Touchdown celebrations
Before entering the endzone, hold L1 + L2, then repeatedly tap one of the following buttons after scoring:

Heismen pose
While holding L1 + L2, repeatedly tap X.

Ball spike
While holding L1 + L2, repeatedly tap Circle.

Muscle flexing
While holding L1 + L2, repeatedly tap Square.

Back flip
While holding L1 + L2, repeatedly tap Triangle.

Spin the ball
While holding L1 + L2, repeatedly tap R1.
Submitted by Jeremy Temple

 

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GIMMEDABALL recievers always catch ball