Here is the full list of all 40 Tainted Grail: Conquest achievements.
Reach level 20 with the Pathfinder
Kill 3 Treasure Guardians in a single run.
Reach level 20 with the Wyrdhunter
Use 3 items in one turn.
Recruit the Bard
Reach any place at the leaderboard.
Recruit the Ghost
Recruit the Seamstress
Upgrade a Quest Card
Win a fight in one turn.
Slay the Third Guardian
Slay the Second Guardian
Light a wyrdcandle to an Ultra level in combat.
Recruit the Candlemaker
Slay the First Guardian
Find your furry companion
Deal more than 3000 damage in a single Hit.
Recruit the Scientist
Spend all Energy without dealing any damage 3 turns in a row.
Recruit the Master-At-Arms
Recruit the Blacksmith
Kill your first Treasure Guardian
Die and immediately start a new run.
Win the fight in the tutorial.
Win a fight having less than 5% HP.
Reach level 20 with the Summoner
Reach level 20 with the Necromancer
Reach level 20 with the Blood Mage
Reach level 20 with the Berserker
Reach level 20 with the Sentinel
Reach level 20 with the Zealot
Reach level 20 with the Apostate
Draw your entire deck in one turn.
Play your entire deck in one turn.
Stun an enemy that intends to attack you with 10 or more Hits.
Get enemy's Armor to -500.
Finish a run fighting in less than 15 combat encounters.
Use 10 items in a single combat.
Win a run without using Healing Potions in combat.
Win a run with 8 or less cards in your deck.