Resident Evil 2, known in Japan as Biohazard 2, is a 1998 survival horror video game originally released for the PlayStation. Developed by Capcom as the second installment in the Resident Evil series, its story takes place two months after the events of the first game, Resident Evil. It is set in Raccoon City, an American community whose residents have been transformed into zombies by the T-virus, a biological weapon developed by the pharmaceutical company Umbrella. In their escape from the city, the two protagonists, Leon S. Kennedy and Claire Redfield, encounter other survivors, and are confronted by William Birkin, the mutated creator of the even more powerful weaponized pathogen, the G-virus.The gameplay of Resident Evil 2 focuses on exploration, puzzle solving and combat, and features typical survival horror elements such as limited saves and ammunition. The game's main difference from its predecessor is the "Zapping System", which provides each player character with unique storylines and obstacles. Resident Evil 2 was directed by Hideki Kamiya, produced by Shinji Mikami — director of the first Resident Evil — and developed by a team of 40–50 people over the course of 21 months. The initial version of the game, commonly referred to as Resident Evil 1.5, differed drastically from the released product and was scrapped at a development stage of 60–80 percent, after being deemed "dull and boring" by the producer. The resulting redesign introduced different settings and a more cinematic story presentation, supported by a soundtrack that employs "desperation" as an underlying theme.Resident Evil 2 was widely acclaimed by critics, who praised its atmosphere, setting, graphics and audio. Its controls, voice acting and inventory system garnered some criticism, however, and certain reviewers disliked its puzzles. The game has become a million-seller, and is the franchise's most successful title on a single platform. Years after its first release, Resident Evil 2 was included in several lists of the 100 best games. It is now widely considered to be one of the best video games ever made. Following its initial success on the PlayStation, it was ported to Microsoft Windows, the Nintendo 64, Dreamcast and GameCube, and was released as a modified 2.5Dversion for the Game.com handheld. The story of Resident Evil 2 was retold and built upon in several later games, and has been adapted into a variety of licensed works. Capcom released a sequel in 1999, and are developing a Resident Evil 2 remake.