Here is the full list of all 59 The Bard's Tale IV: Directors Cut achievements.
Save the world
Keep Melody as your starting character
Defeat the final boss with only 3 party members
Complete the final dungeon
Kill Bishop Henred
Put King Gaerwyn to rest and restored peace in the Haernhold
Find the Strifespear
Defeat Tarjan
Slay a corrupt paladin
Defeat Lagoth Zanta
Summon a Pillar of Flame
Have a Practitioner attain the Archmage class
Clear the Stronsea Isles of Miasma
Reach level 20
Have a Practitioner attain the Sorcerer class
Have a Practitioner attain the Wizard class
Defeat Mangar
Clear the corruption in the Forest of the Inchriach
Find the Destiny Wand
Reach level 18
Hoard 10,000 gold
Find the Spectre Snare
Have a Practitioner attain the Magician class
Have a Rogue attain the Dirty Fighter class
Unlock the magic within a puzzle weapon's hilt
Have a Rogue attain the Saboteur class
Have a Rogue attain the Shadow class
Have a Rogue attain the Assassin class
Have a Rogue attain the Thief class
Have an adventurer attain the Saint class
Have a Fighter attain the Champion class
Have a Fighter attain the Commander class
Have a Fighter attain the Defender class
Have a Fighter attain the Veteran class
Have a Fighter attain the Vanguard class
Have a Bard attain the Brewmaster class
Have a Bard equipped with both the Jesters Shoes and Jesters Cap
Have a Bard attain the Minstrel class
Have a Bard attain the War Chanter class
Have a Bard attain the Troubadour class
Have a Bard attain the Rabble-Rouser class
Defeat Gaufroi
Slay a paladin
Uncover the secret of sinister street
Reach level 10
Discover the gloves of the dead mage's apprentice
Defeat the wraith of Mangar
Have a Practitioner attain the Conjurer class
Unlock the magic within a puzzle weapon's grip
Use standing stones for the first time
Hire a mercenary
Unlock the magic within a puzzle weapon's pommel
Unlock the secrets of a code wheel statue
Pray to an Altar of Gratitude
Craft your first item
Create a Fighter as your starting character
Create a Rogue as your starting character
Create a Practitioner as your starting character
Create a Bard as your starting character