Who Framed Roger Rabbit on NES. Ghostbusters was more disappointing, but I've at least kinda figured out how to play it over my lifetime. WFRR I'm clueless on. I think it's some kind of point and click, but I'm not really sure. There's a part where you have to call a real life telephone number to progress.
Finally, I know what the phone call does!
Maybe I've been too hard on Roger Rabbit NES....
By the time I got around to playing it, the number was deprecated and I definitely wasn't figuring out how to actually beat it! I guess I just assumed it gated me from the end, when it was probably some other esoteric thing.