Opeth's live performance at the Camden Roundhouse, in London, on 9 November 2006, was released as the double live album The Roundhouse Tapes, which topped the Finnish DVD chart. On 17 May 2007, Peter Lindgren announced he would be leaving Opeth after 16 years. "The decision has been the toughest I've ever made but it is the right one to make at this point in my life," Lindgren said. "I feel that I simply have lost some of the enthusiasm and inspiration needed to participate in a band that has grown from a few guys playing the music we love to a worldwide industry." Ex-Arch Enemy guitarist Fredrik Åkesson replaced Lindgren, as Åkerfeldt explained "Fredrik was the only name that popped up thinking about a replacement for Peter. In my opinion he's one of the top three guitar players out of Sweden. We all get along great as we've known each other for maybe four years and he already has the experience to take on the circus-like lifestyle we lead as members of Opeth." Watershed and In Live Concert at the Royal Albert Hall (2008–2010) Opeth entered Fascination Street Studios in November 2007 to record their ninth studio album, with Åkerfeldt producing. By January 2008, Opeth had recorded 13 songs, including three cover songs. The finished album, Watershed, features seven tracks, with cover songs used as bonus tracks on different versions of the album. Watershed was released on 3 June 2008. Åkerfeldt described the songs on the album as "a bit more energetic". Opeth toured in support of Watershed, including headlining the UK Defenders of the Faith tour with Arch Enemy, an appearance at Wacken Open Air, and the Progressive Nation tour with headliner Dream Theater. Watershed was Opeth's highest-charting album to date, debuting at number 23 on the US Billboard 200, on the Australian ARIA album charts at number seven and at number one on Finland's official album chart. Opeth went on a worldwide tour in support of Watershed. From September to October, the band toured North America backed by High on Fire, Baroness, and Nachtmystium. They returned to tour Europe for the rest of the year with Cynic and The Ocean. In 2010, Opeth wrote and recorded the new track, "The Throat of Winter", which appeared on the digital EP soundtrack of the video game, God of War III. Åkerfeldt described the song as "odd" and "not very