I loved lightgun games on the old systems, and I think the Sega Saturn's Stunner was the best hardware of the lot. The obsolescence of CRTs pretty much killed the tech, but the gameplay style has made a bit of a resurgence a couple times with the advent of the Wii and VR.
Not sure I’d want it to come back, but this post brought back the memory of Boktai. It was a gameboy game where the cartridge had a built in light sensor that let you charge your weapon within the game.
https://en.m.wikipedia.org/wiki/Boktai:_The_Sun_Is_in_Your_Hand