The German theatrical version, although rated "Not under 18", was cut by 55 seconds (it is based on the US R-rated version). Since there are different rating standards for theatrical and home video releases this rating was denied for the DVD release. The cut theatrical version was therefore released on DVD with a SPIO/JK approval. Additionally an even more cut version (ca. 8 minutes) with a "Not under 18" rating was released as well for sell-through. As with Saw III (2006) the US unrated version was released as well but only in Austria, therefore avoiding probable legal problems with German judiciary (resulting in intended high imports to Germany).
There is an unrated director's cut available (known as the Extreme Edition in other countries), which restores - amongst other footage - violence cut for the 'R' rating.