Even though Rockstar communicated they don't consider GTA Online as part of GTA V, they may have lots in common. Grand Theft Auto Online: GTA Online has built a strong player community that keeps growing.
More rigid body improvements have also been added to improve how objects and vehicles react when deformed or how characters react when they walk up a steep slope (they will stumble and ragdoll down the hill). The whole physics engine has been improved for this title, including new vehicle physics, underwater physics, new above physics similar to GTA IV, more realistic aircraft and turbulence physics, or player damage in high-speed vehicle accidents.
Your journey will start in a million-dollar heist affair with the three iconic protagonists, Michael De Santa, Franklin Clinton, and Trevor Philips.