Here is the full list of all 14 More Brain Exercise achievements worth 200 gamerscore.
Solve a Sudoku puzzle on Hard.
Solve a Sudoku puzzle on Medium.
Solve a Sudoku puzzle on Easy.
Unlock Sudoku.
Complete Brain Training 30 days in a row.
Complete Brain Training 7 days in a row.
All minigames unlocked.
Complete Brain Training 3 days in a row.
Be awarded "Solar System" rank in all games on Hard mode.
Be awarded 100 points for Frontal lobe exercises.
Be awarded 100 points for Temporal lobe exercises.
Be awarded 100 points for Parietal lobe exercises.
Be awarded 100 points for each lobe area.
Be awarded a maximum Brain Age of 25 for three consecutive days.