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