We'll hide treasure throughout. Then I start drawing in the landscape. Well, our adventure is a ghost town, and the ghost town has this long narrow street with a bunch of stores on either side. Okay, what type of stores. That's the landscape part.
Some people enjoy playing the games to find out how many different ways they can win.
In mission-type adventure games the challenge would be in finding how many different ways they can go through. In a goal-oriented adventure, there might be easier or quicker ways of accomplishing the goal. All in all, an adventure game is like a book. Some books can be read quickly. An adventure game can take anywhere from a month to a year.