Phantom Doctrine
47 Achievements
GOG
Tactical Espionage
Find 50 secrets on tactical levels.
26.6%
How to unlock the Tactical Espionage achievement in Phantom Doctrine - Definitive Guide
Dakari
TrueSteamAchievements
TrueSteamAchievements
Very easy but comes with time. On every level there are secrets like documents on tables or containers like cabinets where you can find it. Just keep looting while on mission.