Walkthrough Gameplay...

Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Blade Master	Kill twenty enemies with the blade.
Easy Mode - Bronze Achievement	Finish the game on Easy difficulty.
Expert at wasting ammo	Known for using more bullets than necessary, leaving no ammo spared.
Hard Mode – Gold Achievement	Complete the game on Hard difficulty.
Heart of Steel	Completed the game without using any health injections.
Master Swimmer	Never die while swimming.
Normal Mode – Silver Achievement	Complete the game on Normal difficulty.
Not Alone	Adam directly helped you, proving you're never truly alone.
Poor Adam	Let Adam die more than twenty times.
Quick Thinker	Finish a puzzle in record time.
The Conqueror	Complete the game on Hard Mode without dying during regular gameplay.
Untouchable	Defeat any boss on your first try without dying.