I recall buying Portal by Activision for Amiga at a local shop without having read any reviews before; as a huge sci fi movie/games fan I thought it was a sort of adventure like game but got hugely disappointed after discovering it was "just" a novel. My less than adequate English knowledge back then also prevented me from appreciating it for what it was, so I tossed it in a drawer before finishing it until the day I sold my Amigas.