Pokémon X and Pokémon Y (ポケットモンスター X・Y) are role-playing video games developed by Game Freak and published by Nintendo for the Nintendo 3DS. They are the first installments in the sixth generation of the Pokémon series of role-playing games. both X and Y were released worldwide on October 12, 2013, Upon release, X and Y received critical acclaim from critics who praised the advancements in the gameplay and the large innovation that they brought to the franchise. The highly anticipated games were a commercial success, selling four million copies worldwide in the first weekend, beating Black and White's record and making them the fastest-selling games on the 3DS. As of April 2014, the games have sold over 13 million copies, becoming the best-selling games on the system.