Here is the full list of all 18 Margo: The Bean Adventure achievements.
COLLECT YOUR FIRST HAT
COLLECT 1O HATS
USE YOUR FIRST HINT
DEFEAT THE SUN WITHOUT TAKING ANY DAMAGE
SHOW THE HIDDEN HAT IN LEVEL 08 IN CHAPTER 1
SHOW THE HIDDEN HAT IN LEVEL 03 CHAPTER 2
DEFEAT DESERT MONSTER WITHOUT TAKING ANY DAMAGE
END CHAPTER ONE
END CHAPTER TWO
END CHAPTER THREE
END CHAPTER FOUR
DEFEAT THE SUN
DEFEAT DESERT MONSTER
DEFEAT SNOW MAN
DEFEAT SPACE GUARDIAN
DEFEAT SPACE INVADER
DEFEAT BLACKHOLE
THE END