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