Here is the full list of all 20 Crypt Stalker achievements.
Complete The Boss Run
Complete All Get To End Challenges
Complete All Limited Jump Challenges
Complete All No Weapon Challenges
Complete All No Whip Challenges
Complete All One Hit Kill Challenges.
Complete All Timer Challenges
Complete Handheld Final Stage.
Complete Handheld Stage Three.
Complete Handheld Stage Two.
Complete Handheld Stage One.
Complete The Final Chapter.
Complete Chapter Eight.
Complete Chapter Seven.
Complete Chapter Six.
Complete Chapter Five.
Complete Chapter Four.
Complete Chapter Three.
Complete Chapter Two.
Complete Chapter One.