Here is the full list of all 26 Baldur's Gate: Dark Alliance II achievements worth 1,000 gamerscore.
Complete a Human Barbarian Playthrough on any difficulty
Complete a Dark Elf Monk Playthrough on any difficulty
Complete a Moon Elf Necromancer Playthrough on any difficulty
Complete a Dwarven Rogue Playthrough on any difficulty
Complete a Human Cleric Playthrough on any difficulty
Complete the game on any difficulty
Complete the game in co-op mode
Gain your first level
Max level any character
Kill 3 enemies with a single explosive barrel
Kill 100 Goblins
Defeat Bile-Tooth
Search through 500 items of loot
Kill 1000 enemies with a melee weapon
Kill 1000 enemies with a ranged weapon
You died...again
Beat the game on Extreme mode
Max out your carrying capacity
Create 42 custom items in the Workshop
Defeat 500 enemies as Drizzt Do'Urden
Defeat 500 enemies as Artemis Entreri
Enter the Elemental Planes for the first time
Upgrade one feat to Rank 5
Upgrade one feat to Rank 5 for each character (not including unlocked characters)
Sell an item to the merchant in Baldur's Gate next to the Purple Wyrm
Do 2000 damage with Vampiric Touch