Head Radio is the only radio station from GTA 1 that appears in other games; it was also a station in Grand Theft Auto 2 as well as in GTA III and Grand Theft Auto: Liberty City Stories.

There are unused graphics for a helicopter. When spawned in-game, it moves on the ground like a car.

After the PlayStation version's successful release, development began on a port for the Nintendo 64. Grand Theft Auto 64 was rumored to have graphical enhancements and new missions, but was cancelled without ever having a public appearance.

The game was intentionally given controversial press coverage thanks to the game's PR expert, Max Clifford. Paid by Rockstar, negative press was used because they knew the controversy would help boost sales.