Dark Souls (ダークソウル Dāku Souru?) is an action role-playing open world video game developed and published for PlayStation 3 by From Software in Japan. It was published for PlayStation 3 and Xbox 360 by Namco Bandai Games internationally. Previously referred to as Project Dark, it is the spiritual successor to Demon's Souls. It was released in Japan on September 22, 2011, on October 4 in North America, on October 6 in Australia and on October 7 in Europe of the same year. The game is known for its considerable difficulty, which has prompted much interest and discussion. A PC version was released on August 24, 2012. The downloadable content and the Prepare to Die edition were announced for both consoles and were released on October 23, 2012 in North America, and on October 24 in Europe and Australasia.