10. Buying and Selling Property
If I had to highlight one blatant feature missing from GTA IV it would be a sense of economy in the world. Yes, its nice to buy the odd pair of new trousers, some cool shades, and that funky hat that flies off your head as soon as you get in an open top car, but it was all cosmetic and didnt really impact the game world around you. Remember when you could buy properties in San Andreas? Why not bring it back and take it one step further? The ability to buy houses, selected shops, and even banks, the latter of which generating revenue for you. Thats some basic economy, but why stop there? Why not have sale prices and income fluctuate depending on the state of crime in the area? That could add interesting repercussions when fighting off opposing criminals, or going around causing chaos in areas where you own places or opposing gangs own places. This could have the backlash in forcing the player to think before committing heinous deeds and maybe removing the brain dead joy of murderous rampage, but if implemented with care it could be worth it for the strategy.