I'm interested in hearing about video games, old or new, that are actually, truly unique. By this I mean games that have no real equal in terms of the gameplay experience. Let me give you an example of a game that I feel is still very unique.
This is a first-person adventure, strategy, resource management game. The game expertly mixes these genres into a game that, to this day, feels very unique to me. The game is based around pushing forward the narrative of the book Dune through simple adventure mechanics as well as managing spice production, simple military strategy and training, and vegetation growth. I've replayed it recently and I still can't think of a game that mixes these components together and this game does it really well.
So, what are some really unique games that might have been overlooked or forgotten with time?
To clear up any confusion I'll try to better explain my meaning behind this thread. What I'm going for by saying 'unique' is the experience of playing the game. The question that should be asked when you think about a unique game, for this thread in particular, is, "Based on my experience with the game, is this game like anything that I've played before or since?". I don't mean to say the experience was unique when it was released but rather is it still unique now (so Wolfenstein 3D wouldn't fit this definition because FPS are certainly the norm since the game's original release). Further, the 'experience' could refer to the story, the gameplay, the presentation, or anything else. One's experience is entirely unique to the individual. The point is whether or not, to you personally, was the experience of playing the game in question unique and one that you haven't had with any other game since or before the game in question. Further, the hope is that one can explain why the game is unique so that we can all understand where the person is coming from.