Outworld is one of the six main realms in the Mortal Kombat series of fighting games.
Outworld's known history goes back millions of years and points at Onaga the Dragon King as its first known ruler. Although he would eventually be supplanted by Shao Kahn, they both shared the same vision: expanding Outworld by taking other realms by force. Unwittingly, both were being controlled by echoes of the One Being. Partially as a result of the despotism both emperors displayed, Outworld is in a constant state of turmoil, albeit more so under Shao Kahn than under Onaga.
Outworld is a large and often hostile realm of varying landscapes, owing to its nature as a composite realm encompassing an unknown amount of conquered and merged realms. Its primary landscapes appear to consist of barren wastelands, vast deserts, molten caverns, pools of acid, dense forests with animated faces, sinister temples and shrines, and high mysterious mountain peaks. Outworld boasts many powerful, fearsome races and deadly monsters. Small villages can be found scattered throughout the landscape and, much like Edenia, the realm teems with magic. However, aside from the cities of Lei Chen and Z'Unkahrah, no real metropolises have been seen in the series. Based on the few cities and villages that have been seen, both the architecture and material culture of Outworld bear strong similarities to East Asian and Middle Eastern cultures.
Outworld also houses a brewery, specializing in 'Outworld Wine', a favorite of master Bo' Rai Cho. It's often rumored amongst many Outworld inhabitants that Earthrealm's rice wine 'puts Outworld Wine to shame'. Commuters also ride the Dragonfly, which is said to be the fastest form of transportation across the vast expanses of Outworld, aside from sorcery and actual dragons. There are many of these flying transports, each with its own set of destinations.
- Immortal - Shao Kahn
- Dragon - Onaga
- Outworlder - Bo' Rai Cho, Li Mei, Reiko, Skarlet
- Shokan - Goro, Kintaro, Sheeva
- Saurian - Khameleon, Reptile
- Tarkata - Baraka
- Centaurian - Motaro
- Osh-Tekk - Kotal Kahn, Kotal K'etz
- Kytinn - D'Vorah
- Naknada - Kollector
- Edenian - Tanya, Rain
- Vampire - Nitara
- Other - Ermac, Mileena, Ferra/Torr, Meat, Khameleon
Outworld was under an intense scrimmage as Kitana made a failed insurrection to take Kahn's throne. One of Jerrod's knights, Asgarrth, helped the princess lead the rebellion and ally with the Shokan. Unfortunately, Shang Tsung posed as Sheeva and functioned as the mole alerting Motaro of their plot. Raiden found out of his schemes, and so he sent the Centaur and Tarkan warriors against Tsung's revenge on taking the throne for himself. Shao Kahn escaped with a pair of Shadow Priests, and there was a brutal slaughter between the two factions.
Three months later, there was stragglers led by Komodai and the Saurian army, remainders of Reptile's army. Though they were killed by Kung Lao before they retreated. Later on, Kitana offered for Liu Kang to investigate since Stryker never found any activity since the incident. By the time the Edenian and Champion reached it, they beheld so many dead carcasses of Tarkans, Shokan, and Centaurs left by the failed insurrection. They also saw Kano struggling to walk away, until the three of them became paralyzed and frozen when it began to seep into Earthrealm. The trio became separated within the merging realm afterwards.
By the time Liu Kang emerged victorious against Kahn at the Pit III, Outworld, along with Earthrealm, was restored. Although, Sindel as the benevolent Queen restored her throne, refused to extend to its boundaries, and rather restore the ruins of Edenia; as being in that corrupt, dead realm would reveal dark memories of her unwillingly serving the Emperor.
- Crocodile Isle from Diddy's Kong Conquest may have been the inspiration from Outworld; they each tend to have a steep and towering fortress consisting of various environments, enemies roam amok there, they serve an ironclad ruler, and a crucial incident of abduction led the heroes to infiltrate both dangerous territories.