Full list of all 42 The King is Watching achievements.
The base game contains 29 achievements, and there are 2 DLC packs containing 13 achievements.
Beat each boss of the Volcano
Achieve victory on Volcano on Threat Level 6
Achieve victory on Volcano on Threat Level 10
Achieve victory on Village on Threat Level 6
Achieve victory on Village on Threat Level 10
Achieve victory on Graveyard on Threat Level 6
Achieve victory on Graveyard on Threat Level 10
Achieve victory on Dark Realm on Threat Level 6
Achieve victory on Dark Realm on Threat Level 10
Achieve victory on Threat level 10 with Emperor Taizong of Tang
Achieve victory on Threat level 10 with King Xerxes
Achieve victory on Threat level 10 with Queen Cleopatra
Beat each boss of the Dark Realm