Here is the full list of all 12 Backstreets of the Mind achievements.
Won all mini-games
Earned 10'000 score in Starship videogame
You've choosed the path of conqueror of nature
You've choose the path of harmony with nature
Didn't use any hints to complete the Game
Used less than 10 hints to complete the Game
Became a Millionaire in 30 days
2nd chapter is passed
Hit all targets in Submarine videogame
1st chapter is passed
You've reached 10 stars at fastfood cafe
Didn't use hints at scene