The Doppler Effect is an achievement in The Witcher 3: Wild Hunt and requires one to complete Contract: An Elusive Thief. As such, this is a missable achievement.
Tips[]
- You don't have to kill the Imp to get this achievement as long as you complete the quest and turn it in.
- The doppler can escape if you don't keep up with him, so make sure you have a save before doing this.
Trivia[]
- The name of the achievement is a play on the sound phenomenon known as the doppler effect.