The following are known Action Replay Codes for Triple Play 99 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
8008e9c40000

Away Team Scores 50
8008e9c43200

Home Team Scores 0
8008e9c00001

Home Team Scores 50
8008e9c03201

L1+R1 at Stadium Select for Hidden Stadiums
d01174900600
801fff200001

L2 for 0 Outs
d00892b60100
3008ecb10000

L1 for 3 Outs
d00892b60200
3008ecb10003