Well, Macromedia Director with Lingo (the software used to produce most of them) was released in '88. (Director is older, but had limited interactivity authorin

Well, Macromedia Director with Lingo (the software used to produce most of them) was released in '88. (Director is older, but had limited interactivity authoring capability before Lingo.) It definitely had image rollover effects when I was working with it in '89. CD drives may not have been ubiquitous at the time, but deployment via stacks of floppies was going on.