If you have completed all you tasks make sure you have beaten all the chess and gobstone champs. After that the game will show u at 100 % complete. Remember that you have to beat each gobstone player three times in a row for it to count. Then there is another champion of the house champions if you will that you have to beat you have to play all the different types in that game. Dont forget the two exploding snap players either. I hope this helps.