Here is the full list of all 19 Hero Academy 2 achievements.
Win 5 PvP Duels
Win 10 Games with a Council Deck
Win a Duel without taking any Crystal Damage
Collect 10,000 Gold
Collect 100,000 Gold
Collect 250,000 Gold
Win 100 PvP Duels
Win 2,500 PvP Duels
Craft 10 Cards
Craft 250 Cards
Craft 1,000 Cards
Win 10 Games with a Dark Elves Deck
Win 10 Games with a Wardens Deck
Summon 500 Heroes
Equip 250 Weapons
Cast 300 Spells
Complete 100 Quests
Craft a Legendary Card
Defeat the Wickedpedia