Based (loosely) on the movie of the same name,
Dinotopia gives a back story of twin boys who were shipwrecked on a strange island where humans and dinosaurs coexist peacefully... for the most part. A group of evildoers named the Outsiders are out to wreak havoc on the island of
Dinotopia. Worse yet, the twins part ways, one going to side with the Outsiders, and their leader, Zane. The other (whom you control throughout the game) works his way toward becoming the Guardian of Dinotopia.
Your typical 3rd-Person Action/ Adventure game, Dinotopia: The Sunstone Odyssey puts you on the side of peace, and it is your goal to take down the evil within. Along the way you will have to take down Outsiders and scalies (dinosaurs) alike, as well as solve many, many puzzles... if that's what you call them. Unfortunately, the game is very, very linear.
You will be told what needs to be done next in your quest by the characters you interact with, but will more or less be guided the entire way. The puzzles end up usually being solved simply along your path, and don't take much to figure out in the way of brain power. But any way you look at it, the basic premise of Dinotopia is that you need to collect the very powerful Sunstones that have helped protect Dinotopia before time existed, and use them to bring peace to Dinotopia.