Side Effects

Side Effects is an achievement/trophy in Dishonored: Death of the Outsider.

How to Acquire
To unlock this achievement, Billie Lurk has to throw a bottle of Plagued Spirit at a group of at least 3 people and and make them vomit. Plagued Spirit bottles can be found easily at the Albarca Baths or the Spector Club during the first three missions, where a lot of people are present. The easiest way to achieve it is to start a fight and wait for enemies to group together.

Trivia
Побочные эффекты
 * Throwing Plagued Spirit at one person and using Domino to make two other people vomit as well does not trigger the achievement.