Grand Theft Auto V will need to be installed before it is playable, Rockstar says.

In a Q&A on its official site, Rockstar said that the game will ship on two discs on Xbox 360, but only disc two would be needed to run it.

The game’s install size was 8GB, it added.

Grand Theft Auto V is the largest and most ambitious game we have yet created, and takes full advantage of every ounce of processing power available in the current generation of consoles,” said the studio.

As with all previous Grand Theft Auto games, it would come with a map, said Rockstar.

“One big change though with this game is that with a world of this size, we created a double-sided map based poster to make sure players have all the information they might need to discover and explore the world.

“The blueprint map in the other editions does contain plenty of additional information and secrets on it.”

Rockstar said that while players could hurt the two player characters they were not currently controlling, they could not kill them.

“Having found them, (or simply after calling them up and arranging to meet them), you’ll certainly be able to hang out with them, annoy them should you choose, and maybe even assault them, but you won’t be able to kill them,” it said.

“They all have remarkable powers of recovery and good health insurance. The game is based on playing all sides of these three characters’ interwoven stories rather than having generic, interchangeable leads, so permanently killing a major character in that way wouldn’t make sense.

“If a player is determined enough though, they may well find a way to badly injure one of the characters and switching to that character would just put you in the hospital to continue where you left off.”

Rockstar also mentioned that the multiplayer mode was called Grand Theft Auto Online, and that weapon and car customization in the game would be “very deep”.

Grand Theft Auto V will be available for PlayStation 3 and Xbox 360 on September 17.