This is the first 3D Open World Game ever made! This is Hunter from the year 1991. Ten years before GTA III came out! In Hunter you can walk or swim across a big map, step into a car or a truck, drive to anywhere you want to go! You can take a boat or a helicopter. You can even run people over with your car just like in GTA 3. It must be the first open world game ever made so of course it’s here on How Big is the Map.