A Realm was the name given to a dimension occupied by a single world.
The Realms were created by the Elder Gods who split the One Being through the use of a Kamidogu. Despite its separation from its form, the One Being would subtly influence inhabitants of the realm to re-merge the Realms back into its true form. Raiden cannot go into some of these realms because his powers weakens.
Realms
- Earthrealm
- Outworld
- Edenia
- Orderrealm
- Chaosrealm
- Rellim Ocanep
- Netherealm
- Zaterra (was merged with Outworld)
- Vaeternus
- Heaven
- Hinpar
- Yrrek Divad
- Thousands more realms (implied by Baron Reyland in Mortal Kombat: Conquest)