Gameplay
Mortal Kombat X is a fighting game in which two characters fight against each other using a variety of attacks, including special moves, and the series' trademark gruesome finishing moves. The game allows two players to face each other (either locally or online), or a single player to play against the CPU. The energy meter, first introduced in Mortal Kombat (2011), allows players to perform techniques such as "X-Ray" special moves. Similarly to NetherRealm Studios' previous title, Injustice: Gods Among Us, fighters are able to interact with the environment, using parts of the scenery to reposition themselves or using available objects as weapons. In addition, each fighter has three different variations, each featuring a different set of moves they can use during the fight: for example, the character Scorpion features a Ninjutsu variation which gives him specific moves utilizing dual swords, a Hellfire variation which incorporates fiery special moves, and an Inferno variation which allows him to summon hellspawn minions to aid him in the fight.
Returning from the previous Mortal Kombat game is the Energy Meter, which is divided in three sections, and provides access to enhanced special moves (costing one section), breaking combos (costing two sections) and performing X-ray moves (costing all three sections of the bar). Additionally, a Stamina Meter has been added under the health bar, which consists of two sections, and is consumed whenever the player runs, performs a back dash, a combo breaker, a stage interaction, or certain special techniques, such as cancelling Scorpion's teleports.
In addition to the usual Fatalities, Mortal Kombat X features two new types of finishing moves: Quitality, which instantly kills the player's character if they quit during a multiplayer match; and Faction Kills, a set of finishing moves available to players based on the selection of one of the game's five factions (Black Dragon, Brotherhood of Shadow, Lin Kuei, Special Forces, and White Lotus). Brutality finishing moves make a comeback, although different from the ones featured in Ultimate Mortal Kombat 3. Brutalities now take the form of enhanced versions of certain moves that are triggered when said move is used as the final blow to win the final round in a fight, provided certain conditions are met. In addition, the game features stage Brutalities, which are triggered when certain environment interactions are used to finish the opponent. Additionally, stage Fatalities were reinstated in Mortal Kombat XL, being available in three of the game's stages.
For local single player, the game offers Story mode, a plot-driven mode with cutscenes between fights; and Living Towers, an evolved form of Mortal Kombat's Challenge Tower where the play conditions change. Also locally, player vs. player mode is available. Playing online, the play modes include 1 vs. 1 (ranked or random), King of the Hill, Survivor, and Test Your Luck. Another new mode is Faction Wars, where players choose one from the five factions to align with, and join a persistent online cross-platform competition with others, winning points for their faction, contributing in the conflict between them, ranking up personally, and earning special rewards such as faction-specific finishing moves (one of which is unlocked to the player if their faction wins at the end of any given week).
Plot
Two years after the defeat of Outworld's ruler, Shao Kahn, Shinnok attacks Earthrealm with his army of Netherrealm demons, as well as Earthrealm warriors who were killed during Kahn's invasion and are now resurrected as revenants under Quan Chi's control. After fighting their fallen comrades, a strike team led by Johnny Cage, Sonya Blade, and Kenshi open a portal to Raiden's Sky Temple and head to the Jinsei Chamber, the source of Earthrealm's life force, where Raiden and Fujin are seen battling Shinnok and his Netherrealm forces. When Shinnok tries to kill Sonya, Johnny rushes to defend her, inadvertently awakening ancient superhuman powers within himself. Using his newfound powers, Johnny holds Shinnok at bay long enough for Raiden to steal Shinnok's amulet and imprison him inside it, but Quan Chi escapes. Johnny, Raiden, and Sonya track him to his lair in the Netherrealm and defeat him, successfully restoring Scorpion, Sub-Zero, and Jax to human form in the process, though Quan Chi escapes again. In the years that follow, Johnny and Sonya marry and have a daughter, Cassie, though they later divorce. Scorpion, now using his original name, Hanzo Hasashi, rebuilds his Shirai Ryu clan while mentoring Kenshi's son Takeda, and Sub-Zero becomes the new Grandmaster of the Lin Kuei after killing Sektor. Sub-Zero uses the data from Sektor's memory banks detailing Quan Chi's various manipulations of the Lin Kuei, including the truth about the deaths of Hasashi's wife and son, to help end his feud with Hasashi.
Twenty years after Shinnok's defeat, Johnny assembles a new team of young fighters composed of Cassie, Takeda, Jax's daughter Jacqui, and Kung Lao's cousin Kung Jin. After undergoing a training exercise with Sub-Zero, they are deployed to Outworld to resolve a civil war between former empress Mileena, who has obtained Shinnok's amulet from Kano, and Outworld's current emperor Kotal Kahn, with whom Earthrealm has a fragile peace treaty. Meanwhile, in an Outworld refugee camp in Earthrealm, Sonya captures Kano and forces him to reveal Mileena's location. Using this information, Cassie's team aids Kotal in recovering Shinnok's amulet and capturing Mileena, who is subsequently executed on Kotal's orders. No longer believing Earthrealm capable of keeping the amulet safe, Kotal decides to keep it in Outworld's hands, and takes Cassie and her friends hostage as leverage against Raiden. Kotal's insectoid second-in-command D'Vorah, who is revealed as a double agent for Quan Chi, steals the amulet. Cassie and her team escape captivity, and inform Earthrealm of D'Vorah's intentions.
Hoping to stop Quan Chi from getting the amulet, Jax and Kenshi, aided by a Netherrealm local named Sareena, lead an assault on the Netherrealm. After fighting his way through the revenants of his former allies, Jax captures a weakened Quan Chi, who is brought to Earthrealm and held at an Outworld refugee camp. Hasashi infiltrates the refugee camp alongside his clan with the intent of assassinating Quan Chi as revenge for ruining his life, defeating Kenshi, Johnny and Sonya in the process. As Hasashi prepares to kill Quan Chi, D'Vorah arrives with the amulet. Quan Chi manages to finish his spell moments before being beheaded by Hasashi, releasing Shinnok from captivity. Weakened by the Shirai Ryu's previous attack, Johnny is taken hostage by Shinnok and D'Vorah. With the aid of Quan Chi's revenants, Shinnok and D'Vorah assault the Sky Temple, and subdue Raiden and Bo' Rai Cho in the process. Shinnok then enters the Jinsei and corrupts it, transforming himself into a powerful demon in the process.
Cassie's team pursues Shinnok, only to be intercepted by Kotal Kahn and his army. They inform him of Shinnok's return and Kotal decides to kill them, hoping to appease Shinnok and buy time to bolster Outworld's defenses, but Sub-Zero and his Lin Kuei warriors appear just in time to repel the Outworld forces. At the Sky Temple, Jacqui and Takeda occupy the revenants, while Cassie and Jin enter the Jinsei chamber. Cassie defeats D'Vorah, though Jin is knocked out, leaving her to face Shinnok alone. When Shinnok begins torturing Johnny, Cassie manifests powers similar to her father's, which she uses to defeat Shinnok. A grievously-wounded Raiden then purifies the Jinsei, stripping Shinnok of his powers and forcing the revenants to withdraw. Sonya and her soldiers arrive to take Shinnok and D'Vorah away, and the Cage family reunites.
Some time later, the revenants of Liu Kang and Kitana are revealed to have assumed leadership of the Netherrealm. Raiden, now in possession of Shinnok's amulet and corrupted in the process of purifying the Jinsei, warns them they will face "fates worse than death" if they threaten Earthrealm. Before departing, Raiden leaves behind Shinnok's severed, yet still living head as a final warning.