Here is the full list of all 37 Swordbreaker: Back to The Castle achievements.
Kill the Skeleton Captain
Kill the Stone Golem
Kill the Ghost Maid
Finish the game with the Coward Karma
Finish the game with the Hero Karma
Finish the game with the Killer Karma
Finish the game with the Indefinite Karma
Reach level 2
Reach level 5
Reach level 9
Upgrade any skill by 5 points
Get all armor sets in the game
Get all the weapons in the game
Find 30% of the secrets in the game
Find 60% of the secrets in the game
Find 100% of the secrets in the game
Find all the artifacts in the game
Find one artifact
Sell your items for 1000 gold
Collect 1000 coins in locations
Read all the scrolls in the game
Complete the game with no deaths
Use the Freezing spell 30 times
Use the Ice Storm spell 30 times
Use the Flame spell 30 times
Use the Burning Hell spell 30 times
Use the Pestilence spell 30 times
Use the Lightning spell 30 times
Deal 100 critical hits
Take a weapon from an enemy 50 times
Destroy all the enemies in the game!
Help the farmer
Kill the farmer
Complete all side quests in the game
Don't complete any side quests in the game
Summon Joe 20 times
Earn 300 points in Survival Mode