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