Here is the full list of all 93 Baldurs Gate II: Enhanced Edition achievements.
Increase an attribute score to 25.
Have an Armor Class of -15 or lower.
Have a Lore skill of 100 or more.
Become a Grand Master.
Complete the game solo.
Complete the game on Legacy of Bhaal difficulty.
Complete the game on Story Mode difficulty.
Finish the game without any party members dying.
Finish the game with a full party of dead allies.
Reach 150 Hit Points.
Acquire Heroic reputation.
Acquire Despised reputation.
Kill 1,000 creatures.
Become a Fallen Paladin or a Fallen Ranger.
Have Bless, Chant, and Luck active at the same time.
Have Disease, Fatigue, and Poison active at the same time.
Raised enough gold to hire assistance.
Acquire the warrior stronghold.
Acquire the wizard stronghold.
Acquire the thief stronghold.
Acquire the cleric stronghold.
Acquire the paladin stronghold.
Acquire the ranger stronghold.
Acquire the druid stronghold.
Acquire the bard stronghold.
Reach level 30 with a Mage or Sorcerer.
Reach level 30 with a Thief or Bard.
Reach level 30 with a Fighter, Ranger, Paladin, Monk, or Barbarian.
Reach level 30 with a Cleric, Druid, or Shaman.