Here is the full list of all 24 Dungeon Lad achievements.
Complete 50 total floors
Complete 10 floors in a single run
Kill 50 total monsters
Kill 10 monsters in a single run
Have 20 health at once
Have 5 active upgrades at once
Unlock 10 permanent upgrades
Find a treasure room
Find a monster room
Complete 100 total floors
Kill 100 total monsters
Unlock all permanent upgrades
Block an attack
Use a skill
Have 3 different skills at once
Complete your first quest
Complete five quests
Kill a knight
Kill a demon
Have 50 gold at once
Complete 300 total floors
Kill 300 total monsters
Earn 100 orbs in a single run
Complete 25 floors in a single run