Here is the full list of all 52 HunterX achievements.
Successfully enhance 1 type of weapon to max level.
Reach level 100.
Remove debuff.
Defeat 5 types of bosses without taking any damage.
Explore every map.
Defeat a specific boss.
Complete the monsters in your Archive.
Successfully enhance 1 type of Occult to max level.
Successfully enhance an Occult.
Defeat the Witch in battle.
Acquire the Flame Halberd.
Acquire the Priestess' Curved Blade.
Solve the special puzzle of the Flame Dragon Temple.
Solve the special puzzle of the Born Tower.
Obtain 15 types of Occult.
Acquire the Icy Beam.
Solve the special puzzle of Castle: Upper Floor.
Reach level 50.
Successfully enhance a weapon.
Defeat the Blacksmith in battle.
Resurrect after being killed by a Debuff.
Acquire the Spider Saliva.
Defeat a boss without taking any damage.
Parry an enemy's bullet.
Solve the special puzzle of Castle: Lower Floor.
Acquire the Acid Dragon.
Obtain 5 types of Occult.
Defeat the Priestess in battle.
Solve the special puzzle of Battle Ruins.
Retrieve Karma.
Resurrect after being killed by a monster.
Obtain Occult.
Destroy an enemy's bullet.
Penetrate an enemy with Shadow Dash.
Parry an enemy's physical attack.
Reach the next level.
Reach level 199.
Defeat 10 types of bosses without taking any damage.
Defeat 18 types of bosses without taking any damage.
Acquire the Spirit Sword.
Obtain 22 types of Occult.
Remove all equipment and defeat a monster.
Resurrect after getting caught in a trap.
Complete the items in your Archive.
Acquire all skills.
Destroy 666 Karma Crystals on the map.