The game is played from either a first-person or third-person view and its world is navigated on foot or by vehicle. Players control the three lead protagonists throughout single-player and switch between them both during and outside of missions. The story is centred on the heist sequences, and many missions involve shooting and driving gameplay. A "wanted" system governs the aggression of law enforcement response to players who commit crimes. Grand Theft Auto Online, the online multiplayer mode, lets up to 30 players explore the open world and engage in cooperative or competitive game matches. Development began soon after Grand Theft Auto IV's release and was shared between many of Rockstar's studios worldwide. The development team drew influence from many of their previous projects such as Red Dead Redemption and Max Payne 3, and designed the game around three lead protagonists to innovate on the core structure of its predecessors. Much of the development work constituted the open world's creation, and several team members conducted field research around California to capture footage for the design team. The game's soundtrack features an original score composed by a team of producers who collaborated over several years. Extensively marketed and widely anticipated, the game broke industry sales records and became the fastest-selling entertainment product in history, earning US $800 million in its first day and US $1 billion in its first three days. It received widespread critical acclaim, with praise directed at its multiple protagonist design, open world, presentation and gameplay. It caused controversies related to its depiction of women and a mission featuring torture during a hostage interrogation. Considered one of seventh generation console gaming's most significant titles, it won year-end accolades including Game of the Year awards from several gaming publications. It has shipped over 60 million copies and is one of the best-selling video games of all time. Grand Theft Auto V is an action-adventure game played from either a first-person or third-person view. Players complete missions—linear scenarios with set objectives—to progress through the story. Outside of missions, players may freely roam the open world. Composed of the San Andreas open countryside area and the fictional city of Los Santos, the world is much larger in area than earlier entries in the series.[6][d] It may be fully explored after the game's beginning without restriction, although story progress unlocks more gameplay content. The player character crouched behind a vehicle while in combat. The head-up display elements are visible on-screen. |--| Players may take cover behind objects during firefights to avoid taking damage from enemies. |--| Players use melee attacks, firearms and explosives to fight enemies, and may run, jump, swim or use vehicles to navigate the world. To accommodate the map's size, the game introduces vehicle types absent in its predecessor Grand Theft Auto IV, such as fixed-wing aircraft. Auto-aim and a cover system may be used as assistance against enemies in combat. Should players take damage, their health meter will gradually regenerate to its halfway point.[g] Players respawn at hospitals when their health depletes. If players commit crimes while playing, law enforcement agencies may respond as indicated by a "wanted" meter in the head-up display (HUD). Stars displayed on the meter indicate the current wanted level (for example, at the maximum five-star level, police helicopters and SWAT teams swarm to lethally dispatch players). Law enforcement officers will search for players who leave the wanted vicinity. The meter enters a cooldown mode and eventually recedes when players are hidden from the officers' line of sight (as displayed on the mini-map)..