Once a day, if you do a Training game or a Brain Age Check, you will get a stamp. Should you collect enough of these stamps, you will unlock new games, modes, and options. NOTE: To do Virus Buster after it's unlocked, you must have a stamp for that day.

Unlockable	How to unlock
Change Pen Tip	Get 22 stamps
Change Stamp Design	Get 03 stamps
Comment Settings	Get 08 stamps
Meet and Greet	Get 24 stamps
Meet and Greet - Hard Mode	Get 30 stamps
Photo Recall - Hard Mode	Get 18 stamps
Piano Player	Get 10 stamps
Piano Player - Hard Mode	Get 27 stamps
Select the Piano Player song (2nd time and thereafter each day)	Get 20 stamps
Slideshow Mode	Complete any two Themes
View Tips	Get 16 stamps
Virus Buster	Get 13 stamps
Word Attack	Get 01 stamp
Word Attack - Space Mode	Get 06 stamps