Any time after the initial Brain Age Check, if you obtain a Brain Age score of 20, you will unlock the Challenge Mode. NOTE: This is MUCH harder than what you normally do in Training.
Do a Training game or a Brain Age Check to get a stamp. Note: This only happens once per day. Collect the indicated amount of stamps to unlock the corresponding bonus. Note: To play Virus Buster after it is unlocked, you must have a stamp for that particular day.
BONUS - STAMPS REQUIRED Change Pen Tip - 22 stamps. Change Stamp Design - 3 stamps. Comment Settings - 8 stamps. Meet and Greet - 24 stamps. Meet and Greet Hard Mode - 30 stamps. Photo Recall - Hard Mode - 18 stamps. Piano Player - 10 stamps. Piano Player Hard Mode - 27 stamps. Select the Piano Player song - 20 stamps. Note: This can only be done the second and subsequent times each day. Slideshow Mode - Complete any two Themes. View Tips - 16 stamps. Virus Buster - 13 stamps. Word Attack - 1 stamp. Word Attack - Space mode - 6 stamps.
