obZen is the sixth album by Swedish metal band Meshuggah. It was released in Europe on March 7, 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. The release of the album was followed by their first world tour. A video was filmed for a shorter version of the song "Bleed".