Harry Potter for Kinect

There were only two challenges in the extreme mode that will give you any trouble.

The first is the Mandrake planting challenge. The best advise I can give is to be slow and deliberate when hovering the hand icon over the mandrake when you are choosing it. Once you have a hold of the Mandrake, move your hand back and forth as fast as possible. Always chose to plant in the pot closest to you. You will only have to repel slugs one time and there will be two plants you have to us the repellent on. When watering the plants, the lower you hold your hand , the faster the water pours. No wasted movement and you should have this one done in no tiem.

The last extreme challenge is the hardest part of the game by far which is on the roller coaster in Gringott's bank. Repetition and control are your best friends. I would recommend doing the map 2-3 times trying to remember the turns. The most important thing is to get your timing down on when to lean going into the curves and when to let go of your lean. It gets faster after each dodging stage so you will go through your leans more quickly. The other biggest time grabs are the parts where you have to lean on one rail only. Try to make the lean as slight as possible so that you can get both wheels back on the track until the next lean.

This took me between 10-15 tries before I finally finished with a time just under 44 seconds. Practice makes perfect!

The challenge mode is first unlocked when you complete the main storyline. Casual Challenge mode is available first, completing Casual unlocks Advanced and completing Advanced unlocks Extreme.

Each of the challenge modes consist of 3 tiers of mini games for a total of 6 games. They are all variations on the storyline games with specific requirements. Starting the challenge mode gives you access to the 3 low tier challenges. Completing all 3 of those gives you access to the two middle tier challenges and completing those unlocks the final tier and the final challenge. Completing the final challenge unlocks the achievement for completing the challenge mode.

I won't go into detail for each challenge however the requirements are very clearly laid out. Many of the games require a minimum number of something however the game continues until you fail it. For example Dodge 55 obstacles in the Tri-Wizard Maze is one of the Advanced Challenges. The game will continue after you have dodged the 55th obstacle however at any time after this you can hit an obstacle to end the challenge and it will count as complete.

A couple of the spell casting challenges do have a finite number of targets so if there is no clear way to fail continue until the challenge ends. The third way for a challenge to finish is a timer. If the challenge has a time limit simply continue until the time runs out. The game does have the requirement and your progress clearly displayed as you play the challenge so it is easy to see when you have reached the passing mark.

hupheryspangler has some excellent advice for some of the more difficult challenges for Extreme in his solution. Be sure to read up on those if you are having trouble.