Here is the full list of all 11 Shadowgate VR: The Mines of Mythrok achievements.
Find all magical keystones
Find Yorick the skull
Win the game in Hard mode
Kill 20 monsters
Find 65 clusters of coins
Find all gems
Win the game in Ironman mode
Unlock all Achievements (except Juggernaut)
Find all keys
Find all hidden rooms
Find all potions