The following are known Action Replay Codes for NBA Jam Extreme on Sony Playstation (PS1).

The codes should work with the region specified but may work for other regions as well.

Device Compatibility: Action Replay, CodeBreaker & GameShark

Away Team Scores 0
d00a22800002
800a22800000
d00a22800003
800a22800000

Home Team Scores 0
d00a227c0002
800a227c0000
d00a227c0003
800a227c0000