3. Underwater Exploration
With San Andreas, Rockstar introduced an underwater world to the Grand Theft Auto universe for the first time. It was pretty basic, with almost nothing to do or see, but it was a step in the right direction. It was a sad discovery, then, that whilst GTA IV had amazingly realistic water, you would not be able to swim underwater at all. Now, Rockstar have combined the two to bring us oceans and rivers that not only look and move realistically, but have a secret, massive world lurking beneath the waves, waiting to be explored. To do so, you can scuba suit up, or take a ride in an awesome mini-submarine to discover ships, treasures and whatever else Rockstar decides to hide under the surface.