Neon Abyss
35 Achievements
GOG
First Blood
Death is another beginning.
37.2%
How to unlock the First Blood achievement in Neon Abyss - Definitive Guide
In this one you just have to die for the first time. This comes naturally by playing the game. I think its obvious but you die if all your heart containers deplete.
Simply die for the first time to unlock this achievement.