Approximately 100 people of
Saber Interactive worked on the game. The studio decided to use the
World War Z license for the game as they felt that there were too many risks involved in marketing a new
intellectual property. Matt Karch, CEO of Saber Interactive, described the game as the combination of both the
2013 film and the
2006 novel. Gerry Lane, the character played by
Brad Pitt from the 2013 film, does not appear in the game as the team opted to include multiple survivors who have their own stories. The team took inspiration from
The Chronicles of Riddick: Escape from Butcher Bay when they were exploring how they could incorporate elements from the film and the book into the game.
Left 4 Dead also inspired the developer when they were crafting the game's gameplay. A proprietary
game engine named the Swarm Engine was used to power the game and render the huge zombie hordes. The Swarm Engine is purposefully built to handle up to 500 zombies on the screen at one time. The game was announced at
The Game Awards 2017. The game was released on 19 April 2019 for
Microsoft Windows,
PlayStation 4 and
Xbox One. Saber planned to support the game by introducing more episodes, characters, settings, and competitive game modes, after the game's launch. It was released on 2 November 2021. An upgraded version of the game titled
Aftermath, which includes the Game of the Year Edition and introduces three new locations (Marseille, Rome, and the Kamchatka peninsula in Russia), new characters, a revamped melee system and a first-person mode, was released on 21 September 2021. == Reception ==