There weren't 1000 developers working on GTA IV, certainly not full-time. More like 1000 people who once had at least one small task related to the development,

There weren't 1000 developers working on GTA IV, certainly not full-time. More like 1000 people who once had at least one small task related to the development, sales or promotion of the title. Having said that, 8 level designers making 300+ dungeons is extremely impressive.