Here is the full list of all 29 The Bart Bonte collection achievements.
Get all stars in Factory Balls 2
Get all stars in What's inside the box?
Get all stars in Me and the Key 3
Get all stars in Me and the Key 2
Get all stars in Me and the Key
Get all stars in A Bonte Escape
Get all stars in A Bark in the Dark
Get all stars in Loose the Moose
Get all stars in 40xEscape
Get all stars in Yellow
Get all stars in Duck
Get all stars in Full Moon
Get all stars in Must Pop Words
Get all stars in Factory Balls
Get all stars in Klikwerk
Get all stars in Farafalla
Get all stars in In Drmzzz
Get all stars in Where is cat?
Get all stars in Cat in Japan
Get all stars in Sugar, Sugar
Get all stars in Sugar, Sugar 2
Get all stars in Sugar, Sugar 3
Get all stars in 25
Get all stars in Factory Balls 3
Get all stars in Factory Balls 4
Get all stars in Doggnation
Get all stars in Piksels
Get all stars in Furiosity
Get all stars in all games of the Bart Bonte Collection