obZen is the sixth album by Swedish heavy metal band Meshuggah. It was released in Europe on 7 March 2008, and in North America on March 11, 2008 through Nuclear Blast. Tomas Haake made his return as the studio drummer for the record after the Drumkit from Hell drum software was used on Catch Thirtythree. It is also the first album on which bassist Dick Lovgren performs on an album, despite having been a member of the band since 2004; this is due to the bass having been digitally programmed on the previous album, Catch Thirtythree, and the bass having been performed by guitarist Fredrik Thordendal on the previous I ep. The release of the album was followed by their first world tour. A video was filmed for a shorter version of the song “Bleed”. A two-disc vinyl re-issue was released on March 22, 2019 through Nuclear Blast.