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