3. No Property-Buying Or Territory Mechanics
The last time we were in San Andreas, the city was a hotbed of rivalry split into different gang territories. As CJ, you could overrun another gang's territory by venturing within, starting a fight and taking out a few waves of reinforcements (This got a bit annoyingly repetitive after a while). It was also possible to buy individual properties. GTA 5 has abandoned these ideas, presumably with a view to focusing on the story, Dan Houser commented "We're definitely going to have a very vibrant and fun economy, from earlier in the game to after you've completed everything. There won't be property, but there will be loads of other stuff"