NFL 2000

Slowmo speed setting:
Choose the "Codes" selection on the options screen.
Enter DEDMAN as a case-sensitive code to unlock the "Slowmo" setting under "Game Speed".

Alternate text:
Choose the "Codes" selection on the options screen.
Enter SCRAWL as a case-sensitive code.

High pitched commentary:
Choose the "Codes" selection on the options screen.
Enter SQUEEKY as a case-sensitive code.

Fat players:
Choose the "Codes" selection on the options screen.
Enter LARD as a case-sensitive code. (Information from Cheat Machine)