The films made their DVD debut in 1999, both as part of a boxed set (see "Alien Legacy" below) and as separate single-disc releases of each film ("Aliens" was only available in its "Special Edition" cut, not its original theatrical cut, which did not make it to DVD until the next boxed set). Following the "Alien Quadrilogy" set (see below), each film received individual two-disc releases containing the content of each film from that set. Since then, there have been multiple issues and reissues of the films, in both their theatrical or extended version, though some single releases include both.