Greyscale is an achievement in the Shadow Plague DLC. It involves infecting the scientists investigating the skeletons at Stonehenge.
How to get this achievement?
- Start in any country.
- Evolve Therianthropy and Night Wraith and start moving your vampire. Remember to avoid keeping it in a country for too much time.
- Wait for the headline "Tourists topple standing stones at Stonehenge"
- Evolve Shadow Blessing and start spreading your plague.
- Evolve the Dark Pustules, Hypersensitivity, Malignant Pigmentation, Pallor and Latent Adaptation. Devolve any other symptom.
- Wait for the "Mutated skeleton found at Stonehenge" headline.
- Evolve Air 1, Air 2, Water 1, Water 2 and Extreme Bioaerosol while you keep moving your vampire.
- Wait for the "Mutated skeleton infected with Nox Eternis" pop up.
- Continue moving until the "Nox Eternis infects Stonehenge team" pop up shows up. This will grant you the achievement.