Each of the four films is presented in two different versions — the original theatrical release and an alternate, typically extended cut. Three of these alternate cuts (the Alien Director's Cut, the Alien3 Assembly Cut and the Alien Resurrection Special Edition) were created especially for the Quadrilogy set, while the fourth, the Aliens Special Edition, had previously been created for home video in 1992. Additionally, the Alien Director's Cut received a limited theatrical release several months prior to the release of the box set, to coincide with the 25th anniversary of the original release of Alien.