Three years after Umbra, an alien spacecraft appears in the sky and abducts the Mayor. With just one clue and no ideas, his wife and the police call on you a second time. Following this clue leads you to a gateway which takes you to the alien planet. Once there, you are met with a strangely empty landscape, no people or animals and a mystery that seems to pervade the entire planet. Continuing to solve the mystery will show you technology thousands of years more advanced than anything on Earth, worlds different from anything we have ever known, and a foreign culture waiting to be discovered.
You must follow the intricately laid trail of clues to discover the reason behind the abduction. Your search will lead you to the other side of the universe and back, and finally to rescuing the Mayor. But in addition to achieving this goal, you will be left with a thorough knowledge of the workings of the first alien civilization ever to be discovered.
Tellurian contains several alternate endings, each with their own set of clues and each will leave you with more knowledge of the alien culture. This will provide you with hours upon hours of fun gameplay, mindbending puzzles, and stunningly beautiful graphics and animations.