Here is the full list of all 15 RYAN BLACK achievements.
Level 7 successfully finished
Level 6 successfully finished
Level 5 successfully finished
Kill 1000 enemies
Level 4 successfully finished
Level 3 successfully finished
Level 2 successfully finished
Level 1 successfully finished
First mutant killed
Deal 5000 damage with melee weapons
Slay all kinds of different enemy species
Deal 5000 damage with all kinds of grenades
Finished game without have being killed
Finished game in Hard mode
Pass through a full level without being damaged