The achievement
unlocks when you use the Discrepancy Amplifier for the first time. It is part of
Murder on Eridanos for The Outer Worlds. Once the DLC is installed and begun,
the achievement is story related and cannot be missed.
During the quest,
The Last Role of Halcyon Helen, follow the quest marker and talk to
Constable Keene. During the conversation,
Dr. Goodnight gives you the
Discrepancy Amplifier, a forensic tool. Equip it in a weapon slot. Press
to zoom in on Helen's body. Footprints next to the body become visible. Press
to analyze them and pop the achievement.
Note: Screenshots taken on the
Spacer's Choice edition where the achievement earns you only 10 GS in contrast to the 15 earned in the
Murder on Eridanos for The Outer Worlds DLC.