Here is the full list of all 62 HyperParasite achievements.
Kill 1000 Enemies
Kill 100 Enemies
Complete a Full Combo
Unlock a new Character
First Game Over
Complete the Tutorial
Unlock all Act 1 Characters
Unlock all Act 2 Characters
Unlock all Act 3 Characters
Unlock all Act 4 Characters
Unlock all Act 5 Characters
Unlock all Characters
Open the Credits screen
Kill 10000 Enemies
Kill 100000 Enemies
Equip one Skill of each type
Get 5 Parasite Lives
Kill 100 Enemies as Parasite