This Skybound CD-i set was presented on a demo disc called 'CD-i World' and published in 1994 by Valkieser Multimedia. It was recently discovered by CD-i member Retrostuff, posting the video on our Discord channel. It shows a four disc set full of information about aircrafts, including digital video material. There is some kind of quiz and a reference database, but also lots of info on the various aircrafts, including history information. Anything else, rather than this video, is not known about Skybound on CD-i. It was probably planned to be released around 1995 and the boxarts indicate it was not going to be a standard Philips Media publication, but of course this is speculation. It looks like an encyclopedia about aircrafts; possibly it contains so much digital video content that is does not fit on one single disc. In the end, it didn't happen and Skybound on CD-i was never released. These images give a flavour of what it was going to look like:
