"Grand Theft Auto IV is just as big a leap forward [as GTA III], though perhaps in subtler ways, and sets a new benchmark for open-world games. Everything in GTA IV works in harmony. The story would be nothing without the city; the city gains realism from the physics engine; the physics compliment the improved AI; the AI would make no sense without the new cover system. And on and on. There is no one major weak aspect."
55