Here is the full list of all 77 Next Hero achievements.
Achieve village level
Blacksmiths achieve highest level
Achieve the bar highest level
Achieve the monastery's highest level
Achieve highest level of mercenaries
Saw the credits.
Kill the Golem
Find a secret room more than 3 times in one game
First discovered a Secret room
Building a museum in town
Construction of a pub in a village
Marry Sofia
Kill the Dragon
First cleared Stage 5
Kill the King Zombie
Kill the Knight Commander
Kill the King Kobold
Monastery construction in the village
Kill the King Toad
Kill the Horseman Commander
Kill the King Yeti
Kill the King Turtle
Construction of a blacksmith in a village
Kill the Chief Mage
Death from purchasing items in a Dark shop
Kill the King Harpy
Kill the King Jellyfish
First cleared Stage 4
Kill the Chief Ninja
Open more than 10 Boxes in a game
Collect 10 Hearts
First cleared Stage 3
Kill the King Ice Slime
Enter the Colosseum 3 or more times in a game
Kill the King Shark
Kill the King Octopus
Kill the King Slime
Kill the King Toothtrap
First cleared Stage 2
Kill the King Cobra
Have more than 30 Bombs
Have more than 100 Golds
Kill more than 100 Monsters
Have more than 10 Equipmets
Kill the King Mushroom
Kill the King Rabbit Slime
Construction of a mercenary small town
Kill the King Goblin
Break more than 100 Objects
First cleared Stage 1
Kill the King Lynx
Kill the Siren
Kill the King Bat
Kill the Snow Worm
Kill the Chief Archer
Kill the Chief Cannoneer
Kill the King Fire Slime
Kill the King Bomb Slime
Kill the King Skull
Kill the Succubus
Kill the King Salamander
Have more than 30 Keys
Drink more than 10 Potions
Establish a statue of all monsters in the museum
Left the Village
Killed the Elder.
Marrying Diana
Completed item collection
Completed monster collection
Acquire all weapons
Acquire all armor
Acquire other items
Acquire all loot
Completed all the quests
Thank you for playing