A mysterious meteor has crash landed in the icy Antarctic. Within this meteor is a strange box-shaped object named Pandora. Beyond human comprehension, the object can be opened by conventional means, but it emits a powerful response when it detects violent confrontations, like those between your favorite Street Fighter and Tekken characters. Get ready for a fight when series favorites like Ryu, Chun-Li, Kazuya Mishima, Nina Williams and more take the stage for a two vs. two tag team-based fighting game like no other.Featuring Street Fighter's traditional six-button control layout, Street Fighter X Tekken has been programmed to accommodate the four-button layout that Tekken fans are accustomed to. Fans of both series' can access the game easily and perform their favorite moves as well as powerful new combos. With the all-new Gem System, players can upgrade their characters based on their style of play. Activate special Gems during battle and experience a boost in a certain skill depending on the situation and Gem. During ferocious tag team battles, players can choose to sacrifice their own vitality to let their partners enter Pandora mode, where they will experience a surge in power and ability. Players in Pandora mode can perform endless EX and Super Arts moves ~ but Pandora fighters beware ~ if you can't overcome your opponent before the time runs out, then you'll automatically be knocked out. Hone your skills and get ready for the fight in the Briefing Room, where you can upgrade your character with a partner and craft powerful new moves. When your skills are sharpened, enter Scramble mode for nonstop mayhem when all four characters enter the stage at the same time. All your favorite characters from Street Fighter and Tekken have returned for the ultimate contest. Are you ready for the fight of your life?