Here is the full list of all 12 Amazing Princess Sarah achievements.
Defeat the chasing ghost in Angry Princess
Defeat the Greater Lilith
Kill at least 500 enemies in a level while being a vampire
Defeat a Fatty with a slap
Make Sarah reach level 69
Complete a castle without killing anyone but the boss
Complete a castle in less than 6 minutes while being drunk
Rescue Sarah's father
Make 8 hit combo
Reach a save statue while being at full health
Watch game's intro until the end
Reach a save statue while having only one health point left