The following are known Action Replay Codes for Grand Theft Auto Mission Pack #1: London 1969 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

Infinite Lives
800813de2400

No Cops
8002be080000

Press R1 & Select for Weapons
d003c5280801
500004010000
3002bf7d0063

Press R2 & Select for Key
d003c5280201
8002bf8a0001