Here is the full list of all 55 Pixel Heroes: Byte & Magic achievements.
Finish an adventure with each hero class.
Lead all citizens to maximum happiness.
Finish the final campaign without a hero dying.
Play at least once with each hero class.
Defeat the boss of the Gates of Ashtur.
Unlock all hero classes.
Finish an adventure with Enchantress, Shadowmancer and Skyweaver.
Lose 100 times.
Finish an adventure with Fighter, Barbarian and Warrioress.
Finish an adventure with an all-Skyborn party.
Finish a complete adventure without dying once.
Help Mustachio on his path to self-fulfillment.
Help Captain Capslock on his path to self-fulfillment.
Help Sapphire on her path to self-fulfillment.
Escape the red flyswarm 4 times.
Finish an adventure with an all-Dwarf party.
Help Jindid on his path to self-fulfillment.
Lose 50 times.
Listen to Layment, the travelling musicians.
Finish an adventure with Herbalist, Priest and Brewmaster.
Solve all four riddles of the enigmatic idols.
Defeat the captor of souls himself.
Enter a bossfight with a single alive hero and be victorious.
Help Shroom on his path to self-fulfillment.
Finish an adventure with an all-Human party.
Defeat the boss of the Randoom Meteorite.
Defeat the boss of the Arcane Armory.
Defeat the boss of The Boneyard.
Defeat the boss of the Stormy Peaks.
Lose 10 times.
Lose all your heroes for the first time.
Reach 500 HP with one hero.
Defeat the boss of the Cyclopean Pyramid.
Uncover the dark secret of the casino owner.
Defeat the boss of the Ancient Temple.
Evade an attack by the use of Concealed.
Finish 6 dungeons during one adventure.
Defeat the boss of the DevilsReef.
Defeat an enemy only with the fist.
Defeat the inscrutable flying polyp.
Defeat the boss of the Byting Woods.
Revive 3 fallen heroes during one adventure.
Defeat the boss of Old Volcano.
Enter a bossfight with two alive heroes and be victorious.
Use 50 potions during one adventure.
Unlock a treasure chest with no more than 20% chance.
Survive through 3 dungeons in a row.
Defeat the boss of the Sunken Empire.
Defeat the boss of the Goblin Outpost.
Drink 100 glasses of beer during one adventure.
Listen to all stories of the barkeeper.
Finish your first quest.
Defeat the boss of the Haunted Mansion.
Defeat your first enemy.
Defeat three enemies with one hit.