Here is the full list of all 14 Warlander achievements worth 1,000 gamerscore.
Equip a Character with a Legendary title.
Earn 5000 Valor points in one match.
Equip a character with a Rank 4 title.
Equip a Rank 3 title to a character.
Equip a character with a rank 2 title.
Equip the character with a rank 1 title.
Create a character.
Edit your equipment.
Win a battle by destroying the core.
Earn a total of 10,000 Valor points.
Deal a total of 10,000 damage.
Heal a total of 100,000 HP.
Guard against a total of 10,000 damage.
Play 100 games.