Here is the full list of all 15 Dungeon Crawlers HD achievements.
Killed an enemy with 10 more damage than necessary
Killed an enemy with one shot
Complete Chapter 1
Complete Chapter 2
Complete Chapter 3
Complete Chapter 4
Complete Chapter 5
Enemy had 1 HP left, and you missed!
Used the exact damage needed to kill an enemy
Killed more than one enemy with an AoE attack
Found 1 Trophy
Found 5 Trophies
Found 10 Trophies
Found 15 Trophies
Found All 25 Trophies