The story line to be played "out-of-the-box" is usually referred to as "Prime", and is usually played in single-player mode. You, part of 'those who feel the call', arrive near the Cleft, an earth gap next to a volcano. In front of the Cleft, a man who introduces himself as Zandi sits in front of his trailer, encouraging to you to discover the environment and to "join the exploration". Later, you stumble upon a hologram of Yeesha, Atrus' daughter, whose speech remains unclear throughout most of the Prime story, until she re-appears once you have travelled through various Ages, solving their puzzles. At the end, however, you are left uncertain whether you should have trusted Yeesha at all, or if she has actually abused your work for her own goals.
Ages and places