Here is the full list of all 28 Heroes of the Monkey Tavern achievements.
Defeat your first enemy
Reach the level 5
Reach the level 10
Shoot 100 arrows
Bash 10 enemies with a shield
Defeat the werewolf
Burn 50 enemies
Collect 50 items
Cure poison 10 times
Defeat 100 enemies
Find Snaga
Finish the game in easy mode
Finish the game in normal mode
Finish the game in hard mode
Die once
Freeze 20 enemies
Heal 50 times
Unlock all achievements
Defeat 10 enemies
Poison 20 enemies
Inflict 100 damage in one hit
Bring back to life someone of your party
Find 10 secrets
Finish the game with a monk in your party
Defeat 10 snakes
Cast 100 spells
Walk 1000 tiles
Block 20 hits