Before I came across Hologram Time Traveler, I guess I considered Bethesda’s Home Alone for NES the worst game I’d played. We borrowed it from a neighborhood kid at some point. I hadn’t (and still haven’t) seen the movie, but the game was obviously a rushed cash grab. The good version of that game is Spy vs. Spy on the Commodore 64.
One game that I liked and didn’t find out until years later that I wasn’t supposed to is E.T. on the Atari 2600. It was awkward to play, but I admired its strangeness.