American McGee's Grimm: The Frog King

This is the first episode in Season 3 of American McGee's Grimm series. When a princess playing with a golden ball has it fall into a well, a talking frog offers to help. To return the ball, it asks for the princess's love, wants to dine with her and share her bed. The princess agrees as the ball is her favorite toy. Later it turns out that it is not an ordinary frog, but an enchanted king. There are some embarrassing situations before the truth comes out and the curse is broken and the princess has a wedding with the handsome rich king.

However, as Grimm you go through the story and give it a much darker tone with slime literally dripping down your screen as the Dark-O-Meter fills up showing you the percentage of the six levels that have been changed enough to earn you a gold medal. One of the levels has you jumping around a circular stairway with rotating platforms and sliding panels as you must avoid water continuously rising in the chamber.