tl;dr: After Tippett Studios closed in August and its archives were auctioned off, an anonymous buyer called "TippettFan" acquired a folder of CD-ROMs, digitized them, and uploaded the contents to the Internet Archive. The collection contains 90 .ISO disc images with behind-the-scenes material from RoboCop, Starship Troopers, the original Star Wars, and other films, along with test clips of CGI creatures and a 2008 Phil Tippett interview.