At the main menu, select My Madden, and then select Madden Cards. At the Madden Cards screen, select Madden Codes, and enter the following codes to unlock the corresponding cheats. If you entered the cheat correctly, you'll see a confirming screen. All passwords are case-sensitive.

1958 Colts Team: P74X8J
1966 Packers Team: G49P7W
1968 Jets Team: C24W2A
1970 Browns Team: G12N1I
1972 Dolphins Team: R79W6W
1974 Steelers Team: R12D9B
1976 Raiders Team: P96Q8M
1977 Broncos Team: O18T2A
1978 Dolphins Team: G97U5X
1980 Raiders Team: K71K4E
1981 Chargers Team: Y27N9A
1982 Redskins Team: F56D6V
1983 Raiders Team: D23T8S
1984 Dolphins Team: X23Z8H
1985 Bears Team: F92M8M
1986 Giants Team: K44F2Y
1988 49ers Team: F77R8H
1990 Eagles Team: G95F2Q
1991 Lions Team: I89F4I
1992 Cowboys Team: I44A1O
1993 Bills Team: Y66K3O
3rd Down: Z28X8K
5th Down: P66C4L
Bingo!: J33I8F
Da Bomb: B61A8M
Da Boot: I76X3T
Extra Credit: M89S8G
First and Fifteen: V65J8P
First and Five: O72E9B
Fumblitis: R14B8Z
Human Plow: L96J7P
Lame Duck: D57R5S
Mistake Free: X78P9Z
Mr. Mobility: Y59R8R
Super Drive: D59K3Y
Super Bowl XL Stadium: O85P6I
Super Bowl XLI Stadium: P48Z4D
Super Bowl XLII Stadium: T67R1O
Super Bowl XXXIX Stadium: D58F1B
Tight Fit: V34L6D
Unforced Errors: L48G1E