3. Single Player Jobs
This feature had essentially been implemented in GTA 3 with the ambulance, taxi, and police car missions, but they were very trivial and essentially pointless later on in the game as money was so plentiful. In GTA IV this dwindled down to just police based missions. Bringing a bigger variety of missions back, such as ambulance, taxi and fire-fighter work back, but design them to be more involved so theyre not just collect and drop missions. E.g. for the fire-fighter missions allow the player to actually proceed through a burning building putting out fire and saving civilians. Make them useful by also including the buying and selling feature so youre not just using money for purchasing weapons. Or if this seems too orderly and you want to stick to your criminal ways and stay true to the game name, why not pursue gang oriented missions of stealing cars and selling them on or buying and selling weapons/drugs to other criminals. Remember some of those main missions from previous GTAs of dangerous, back ally drug deals that were just bound to go wrong? Include these as part of criminal side missions. This is just finding ways of making the activities outside of the main story worthwhile doing.