Demon World

The Demon World, also known as Hell, the Underworld, the Netherworld, and the Devil Kingdom, is a location seen in the Devil May Cry series. A grim, treacherous place, it is the hellish realm which parallels the Human World, and serves as the homeland of the many demons which populate the games, including the Legendary Dark Knight himself.

The Demon World is an extension of the original darkness that covered the universe before the coming of light. It is in the Demon World where natural demons are born, and it is within the boundaries of this realm where demons are capable of unleashing their full power and strength, with many demons being severely weakened while away from it.

From the few glimpses of the Demon World seen throughout the series, it can be observed that the realm does not follow the same natural and physical laws as the Human World, with examples such as gravity being inverted, ceilings serving as floors, self-rearranging environments, and even naturally occurring events of entirely localized space-time displacement.

The Demon World is also implied to serve as the afterlife for depraved and evil humans, similar to many Abrahamic religions, as mentioned in some of the library files in the original Devil May Cry; however, no deceased humans have ever been observed trapped in the realm in any of the games.