Here is the full list of all 33 Century: Age of Ashes achievements.
Win 10 matches
Win 50 matches
Win 100 matches
Kill 50 enemies
Kill 100 enemies
Kill 200 enemies
Reach level 20
Reach level 50
Reach level 100
Make the enemy coffers explode using the Vault-Breacher
Find and ring the bell on Hünavatn Lake
Complete a match without dying
In Gates of Fire, pass all gates in one try
In Spoils of War, stash a single load of 200 Gold
In Spoils of War, stash a single load of 400 Gold
Smash your dragon into a wall and die
Appear 20 times on the end match podium
Kill 5 enemies with the Drakepiercer
Hatch 5 eggs
Win 10 matches as Marauder
Win 10 matches as Phantom
Win 10 matches as Windguard
Complete the Tutorial
Be ranked
Consume a level 6 Bounty in Carnage
Win a match while in a squad
Kill the Berserk Wraith 5 times in Carnage
Kill 5 enemies while being Berserk
Equip a character with 3 Epic or Legendary items
Win 5 Carnage matches
Win 5 Gates of Fire matches
Win 5 Spoils of War matches
Be showcased before a match