Goblins is like a point n click adventure to me. Not a graphic adventure like Monkey Island, but if we extend our domain to 'point n click adventures', I'd say it fits. But it really is a borderliner of a game.
About Operation Stealth... There was a game released in... ~1993... for ST and Amiga, it was french, and looked very similar... The Shortgrey, I think was the name??? It looked quite cool...