In addition to the single releases, there have been seven complete box sets of the series at various points in its history. With the exception of the DVD version of the "Aliens Triple Pack", each release contained all films that had come out at the time the sets were released. The seven box sets each had unique characteristics and features which were then sometimes reused in later sets or single releases in one form or another, most notably the Blu-ray "Anthology", which includes a detailed archive of many previous releases, including the rare Laserdisc box sets.