Mortal Kombat X (pronounced "Mortal Kombat Ex") is an upcoming fighting game currently in development by NetherRealm Studios. It is the tenth main title in the Mortal Kombat series and is being developed for Microsoft Windows, PlayStation 4, and Xbox One, with a release scheduled for 2015. Like previous entries in the series, Mortal Kombat X is a fighting game in which two players fight against each other using a variety of attacks, special moves, and gruesome Fatalities. The energy meter, first introduced in the previous title, once again allows players to perform techniques such as brutal X-Ray moves, with some refinements made to the system. Similar to NetherRealm Studio's previous title, Injustice: Gods Among Us, fighters can now interact with the environment, bouncing off areas to reposition themselves or using parts of the environment as weapons. Each fighter now has three different variations, each featuring a different set of moves they can use during the match. For example, Scorpion can use the Ninjutsu variation, in which he wields dual swords, or the Hellfire variation, which relies more of fiery special moves. There also plans for fully connected online functionality. Development NetherRealm Studios started publicly hiring for the eighth generation development in April 2012. In July 2013, a new Mortal Kombat game was announced to be in development and was said to be released alongside the film series' reboot in September 2015. At the 2013 San Diego Comic-Con, Lance Sloan, producer of the web series Mortal Kombat: Legacy, confirmed the next Mortal Kombat game to be in production, and that there were intentions of a simultaneous release between the game and a new Mortal Kombat film. In February 2014, actor Kiefer Sutherland revealed his involvement in this "huge game." According to Karen Strassman's (the voice of Kitana and Mileena in 2011's Mortal Kombat) acting resume, the game's working title was Mortal Kombat 2. The game's poster was leaked and an updated version of the series' iconic dragon logo was revealed on May 28, 2014. Series creator Ed Boon posted daily riddles on his Twitter account that constituted a countdown suggesting a June 2 announcement date with the game's title speculated to be Mortal Kombat X. One of the Twitter clues left by Boon teasing this title was the image of a Lincoln MKX emblem posted with the comment, "I wonder what the X stands for?" On June 2, 2014, the title was indeed officially revealed as Mortal Kombat X, alongside an official reveal trailer featuring a fight between the iconic characters Scorpion and Sub-Zero. The game made its first public appearance at the Electronic Entertainment Expo 2014, starting on June 10, where four new characters were revealed, apart from the two already revealed by the trailer. NetherRealm Studios themselves are working on only the PS4 and Xbox one versions.