Post a game that you find to be (among several descriptions) one of the most original, unique, innovative, creative, and imaginative as well as appealing and interesting you have ever seen and/or played

I think Portal/Portal 2 fit that description.

Such a funny and innovative experience that has creative gameplay/level design. And it appeals to a wide range of gamers which is great.

And I agree bulaklak is one of those games too, that game puts you in a trance with its style.