Pokémon Gold Version and Silver Version[a] are the second installments of the Pokémon series of role-playing video games, developed by Game Freak and published by Nintendo for the Game Boy Color. They were released in Japan in 1999, Australia and North America in 2000, and Europe in 2001. Pokémon Crystal, a special edition, was released roughly a year later in each region. In 2009, Nintendo remade Gold and Silver for the Nintendo DS as Pokémon HeartGold and SoulSilver