TerraVision, a laserdisc eduware for the Apple IIgs 

Finally, a program that actually uses the Apple II Video Overlay Card surfaces! Quite a bit more impressive than the setup that my high school had. We only had science LaserDiscs that were controlled by AppleWorks TimeOut Macros! Yeah, I couldn't believe it when I saw it.

That's really impressive for the time, and the hardware setup to run this would've been steep

So, its some kind of separate laser disk device, not using gs hardware or display?

Very cool! Now that your IIgs can control a LD player, will you do versions of your Bluth ports that support laserdisc? :)