Here is the full list of all 21 Dark Rising achievements.
Killed 250 Enemies
Killed 1,000 Enemies
Painstakingly killed 25,000 Enemies
Lose 10 buildings/pledges.
Lose 100 buildings/pledges.
Gain 100,000 score to spend on upgrading your castle.
Gain 500,000 score to spend on upgrading your castle.
Win the first "Swamp" level.
Win all the "Floating World" levels.
Win the first "Depths of the Abyss" level.
Win the game.
Kill the feared "Lava Golem"
Kill 2,500 enemies using outposts, towers, and catapults.
Kill 100 enemies using traps.
Kill 2,000 enemies using pledges.
Train 50 pledges.
Purchase 50 weapons or armor from the blacksmith.
Kill 500 "Giant Ravens".
Kill 250 "Spiders"
Kill 250 "Ghosts"
Kill 5,000 enemies using your castle's defenses.