

The previous versions of the game were closely aligned with Resident Evil: Dead Aim, exploring a group within USSTRATCOM that engaged in counterbioterror missions. However, the nature of his work was altered. The concept of Leon being in a government agency and on a mission was retained. With the game still lacking a script after Yasuhisa Kawamura began working on "Hallucination", Mikami commissioned a script of his own, and worked with Satoshi Yoshimatsu to create a story set after the collapse of Umbrella so it work on its own. Inspired by Onimusha 3, a game Mikami had enjoyed playing but felt could have been better with a different view, he decided to place the camera behind the playable character at all times, unlike the previous "Castle" and "Hallucination" versions which operated on a dolly-cam fashion. According to newly assigned producer Hiroyuki Kobayashi, the development team felt depressed and were hard to motivate after the focus of the game shifted styles to focus more on action. As part of this pressure, Capcom warned him of their intention to not make any new Resident Evil titles if it did not sell well. Due to repeated setbacks with scripts thrown out or models found to use more RAM than any console was capable of loading, Shinji Mikami was put under enormous pressure by Capcom to remove Shibata and take over directing duties himself.

Resident Evil 4 went through a number of successive alterations since the project began in 2000, though it was always intended to be a new kind of Resident Evil game to fully utilise the power of the current-generation consoles. Final version Further information: BIOHAZARD 4 (cancelled 2000 game), Biohazard 4 (Castle Version), Biohazard 4 (Hallucination Version), and Biohazard 4 (Zombie version)
