Here is the full list of all 21 Ku: Shroud of the Morrigan achievements.
Kill 60 Enemies
Thwomp Yourself
Read all of the Ogham Stones
Kill All Bunnies
Get 7 Mist Fairies to follow you
Avoid Taking Damage on the Flying Bird
Listen to what he has to say...
Completed Act I
Chat with all of the Villagers in Act I
Beat the Devs Top Time
Children should never go hungry
Pluck out all of the Watermelons
Completed all Achievements
Completed Act II
Completed Act III
Completed the Epilogue
Survive Fir Bolg with No Damage Taken
Kill Morrigan without Killing any Trolls
Open all Four Combat Arenas
Survive 40 Round in a Combat Arena
Stand in all Fairy Circles