Here is the full list of all 50 9th Dawn III achievements worth 1,000 gamerscore.
Enchanted a piece of equipment
Slain 10,000 Enemies
Rode a mine cart
Caught a Creature
Revived an NPC, Companion or Creature
Unlocked a companion
Slain 1,000 Enemies
Casted a Spell
Crafted an item
Completed a Dungeon to 100%
Slain a Boss
Won your first game of Fyued
Have 10 Creatures in your party
Level up a Creature to 100
Use a Morph Stone on a Creature
Morph a single Creature 50 times
Win 100 games of Fyued
Collect every shiny card
Beat the secret Fyued champion
Unlock all Spells and Abilities
Collect 10,000,000 Gold
Complete the Hunting Journal
Complete the Item Journal
Complete the Fishing Journal
Reach Lorwyck Castle
Beat Halstorm Castle
Complete the Main Quest
Slay 500 Dragons
Slay 100 Valchist
Reach skill level 100 in any craft
Craft all Alchemy recipes
Craft all Cooking recipes
Craft all Weapon Smith recipes
Craft all Armour Smith recipes
Craft all Jewel Smith recipes
Craft all Magic Weaving recipes
Reach skill level 100 in Melee Combat
Reach skill level 100 in Magic Destruction
Reach skill level 100 in Magic Restoration
Raise a settlement's Prosperity to 100%
Complete all Dungeons to 100%"
Rename the Nameless companion
Reach level 50
Reach level 100
Read all equip-able books
Obtain a Camel mount
Catch a large sized fish for it's species
Perform a Critical Hit using the Stealth skill
Defeat the Hole of Kol
Complete Tea Master Rena's quest