GTA London 1969 was an add-on for the base GTA game. It was top-down and set in London during 1969. GTA London is often left out of the GTA chronology.
What it was
An add-on adding London as a playable city. Takes place in the year 1969. Cars are appropriate for the time period. Bird's-eye view camera. Small-scale expansion.
Mainly known for being the only game in the franchise set in London.