Grand theft auto iii hidden packages grand theft auto iii hidden package faq by. This a guide of all hidden packages there are in grand theft auto iii. Steam Community Guide Grand Theft Auto Iii All 100 Hidden It is one of the tasks required to achieve 100 completion in the game. I thought about giving plenty of details about each ones location but i suppose that would ruin some peoples experiences. For grand theft auto iii on the playstation 2 hidden packages map.