Anonymous: I had to also evolve Muscular Hypertrophy in addition to Anabolic Boost to get this achievement. This is the path of least DNA:
- Shadow Blessing > Nocturnal > Steroidal Boost > Pheromone Secretion > Anabolic Boost
- Photophobia > Hyperdontia > Jugular Bite > Shadow Slaves > Muscular Hypertrophy
It sometimes takes a long time for the achievement to appear even after you have these two symptoms evolved.