Here is the full list of all 21 Kingdom of Blades achievements.
Experience your own mortality
Make it snow
Bathe in the blood of your enemies
Reinforcements have arrived
Wield the power of the gods
They'll never get past your metal plate!
Become a bad ass ninja
Become a bad ass ninja (but fail)
You never saw them coming
Face the anger of the gods
The worst way to go...
Death by pretty stones
Complete Chapter One
Complete Chapter Two
Complete Chapter Three
Complete Chapter Four
Defeat the first boss in Endless Mode
Defeat the tenth boss in Endless Mode
Just a good ol' regular slicing
Ok now that's quite a lot of dead bodies
All shall submit and kneel before you!