Here is the full list of all 69 Hero Academy achievements.
Shield a crystal with an Engineer.
Hit three enemy heroes or crystals at once with a single Gunner attack.
Complete all Meet the Council challenges.
Complete all Meet the Dwarves challenges.
Complete all Meet the Dark Elves challenges.
Complete all Meet the Tribe challenges.
Win a game with the Dark Elves.
Hit an enemy target at maximum range with the Sniper.
Win a game by destroying the enemy team.
Take all day to put in your turn after your opponent does.
Attack a single enemy with three different heroes in one turn.
Hit three enemies at once with a Void Monk's attack.
Win a game with the Dwarves.
Pull an enemy off an assault tile with an Impaler.
Link a Medic to a Heavy.
Win a game by destroying the enemy's crystals.
Win a game against a random player.
Win a game with the Council.
Submit 100 turns.
Hit three enemies at once with a Heavy's attack.
Get a Paladin to heal herself.
Hit four enemy heroes or crystals at once with a single Grenadier attack.
Resurrect and fully heal a knocked-out ally in a single turn.
Hit three enemies with a single attack by a Wizard with a scroll.
Use an assault tile to do bonus crystal damage.
Taunt an opponent.
Knock out a full-health enemy with one shot from an Archer.
Submit five turns.
Submit a turn less than three minutes after your opponent moves.
Use the undo feature and try something new.
Knock out an enemy.
Knock out three enemy heroes in one turn.
Complete the Tutorial.
Stomp two enemy heroes in one turn.
Do 2000 or more damage with a single attack.
Destroy two enemy crystals in a single turn.
Win a game and take no crystal damage.
Win 25 games.
Win 100 games.
Add Runemetal, Dragonscale, and Shining Helm to a single Knight.
Do 2500 damage or more with a single Ninja attack.
Win 50 games with the Council.
Weaken three enemies with the priestess in a single turn.
Raise two Phantoms in a single turn with a Necromancer.
Build up a max-health Wraith.
Win 50 games with the Dark Elves.
Knock out three enemies at once with an Annihilator shot.
Win 50 games with the Dwarves.
Win a game with the Tribe.
Execute two enemies in one turn with a Warrior.
Hit three full-strength enemies in one turn with an Axe Thrower.
Do 1000 points of damage with a corpse explosion.
Heal three allies with a chained Shaman heal.
Damage five targets with one Chieftain attack.
Win 50 games with the Tribe.
Win a game with the Team Fortress team.
Have an Engineer equip three allies in a single turn.
Knock out two enemies at once with the Pyro.
Win 50 games with the Team Fortress team.
Complete all Meet Team Fortress challenges.
Win a game with the Shaolin Team.
Win 50 games with the Shaolin Team.
Lower an enemy's maximum health by 250 with a Monk.
Hit three targets with a single Windblade attack.
Debuff three enemies in one turn with a Poisoner.
Removed an enemy hero's buff and a friendly hero's debuff in the same turn with a Taoist.
Resurrect an opponent's Ninja, Wraith, Chieftain, or Annihilator with the Shadow.
Complete all Meet the Shaolin challenges.
Complete all Challenge Collection challenges.