Brain Age is not a game, it's a way of life!
Really Brain Age is like school, but maybe a bit funner.
Your teacher, Dr Kawashima explains the ins and outs of the 'game'play to you. He's very humorous and always in a good mood. (Until you start missing long streaks of training that is).
There are several different types of activities. Most of them include math (simple calculations) or just general pre-frontal cortex exercises.
One example is this; a word will pop up on the screen, it will the name of a colour, but will also be IN colour. You must state the word, not the colour. It sounds easy, but it's a very fun challenge.
A sudoku addition to the package includes 100 puzzles, which is icing on the cake.
In reality, you have to play Brain Age yourself to full understand it. Then you have to keep playing (even for just 5 minutes a day) to get the most out of it.
Personally, me and Dr Kawashima will be 'friends' for a long time.