Colossal Cave can be considered literature in that you are going through an adventure which is a story.  This interactive fiction game definitely tells a story when you put all the pieces together.  I, the main character, went into 11 different stages while going through my adventure.  Almost each stage had something for me to do that would add to my story.  The stages that I did some kind of activity was inside the building, slit of the streambed, steel grate, darkness, debris room, and the orange river chamber. The inside the building stage, I came across four things which were keys, food, a lamp, and an empty bottle.  I picked up the keys, ate the tasty food, took the lamp, and took the empty bottle.  After I did that, I left the building and went on with my adventure.  Then I walked across the valley and upon a streambed where I filled my empty bottle that I took from the building.  After the streambed stage, I came across a steel grate that was locked.  I used my keys from the building to open the grate.  I continued to proceed west below the grate and came upon the darkness stage.  The darkness stage was when I had to think.  I recalled taking a lamp for inside the building and I turned the lamp on.  Once I did this, the darkness stage became a debris room where I picked up a black rod.  I, then, crawled into the sloping e/w canyon that leads me to the orange river chamber.  At the orange river chamber, I entered for the sloping e/w canyon and came across a cheerful little bird singing.  I picked the bird up but I could not bring the bird along with me on my adventure so I placed the bird back down.  This is all that I did in my adventure and in my literature.  The story really has no ending but it still tells a story which makes it a type of literature.