Here is the full list of all 16 Blocky Dungeon achievements.
10 Perfect Strikes in one turn
Do a total of 50 damage in one turn
Take 10k steps
Place 10k blocks
Clear 5k lines
Reach Dungeon Level 50
Reach Level 50
Die during the tutorial
Defeat the Dark Knight
Defeat the Lich
Defeat the Minotaur
Defeat the Tengu
Score more than 999,999 in a run
Defeat 1000 enemies
Complete every Quest
Complete every Quest with 3 Stars