Full list of all 48 Killer is Dead - Nightmare Edition achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
All achievements completed
Received 20 rewards from the beauties.
Gave a present 50 times or more.
Collected all female costumes.
Have a total of $100 million in cash.
Ranked AAA executioner on 44 missions.
Cleared all episodes on Hard Mode.
Cleared all episodes on Very Hard Mode.
Got revived by Mika 20 times.
Cleared all challenge missions.
Made Scarlett your prisoner in body and soul.
Cleared 12 challenge missions.
Ranked AAA executioner on 24 missions.
Cleared 6 challenge missions.
Unlocked all challenge missions.
Increased all Attack and Special skills.
Increased all sub-weapons to maximum upgrade level.
Increased HEALTH to maximum upgrade level.
Ranked AAA executioner on 12 missions.
Increased BLOOD to maximum upgrade level.
Changed costume to Ulti-mondo.
Cleared all sub-missions.
Sliced an enemy upward and finished it in the air.
Completed Episode 12.
Cleared all episodes on Normal Mode.
Cleared all missions.
Completed Episode 11.
Completed Episode 10.
Unlocked 12 challenge missions.
Made Koharu your prisoner in body and soul.
Cleared 6 sub-missions.
Cleared 3 sub-missions.
Completed Episode 9.
Killed an enemy using the "Burst Rush."
Completed Episode 8.
Made Natalia your prisoner in body and soul.
Completed Episode 7.
Killed 100 enemies using the "Head Shot."
Unlocked 6 challenge missions.
Completed Episode 6.
Completed Episode 5.
Completed Episode 4.
Killed an enemy with an enemy attack.
Completed Episode 3.
Completed Episode 2.
Completed Episode 1.