Summary: I really enjoy this game, but it should clearly state on the packaging, that if you play alone these characters will not get you thru the game. With 2 players you can each use a different player to get thru the swap gates. But playing alone, you have to have the swappable characters to get thru those gates. Each of those characters is another $12 plus, and you need one for each element. You also need a giant to get some of the treasures.