Harmony: The Fall of Reverie
28 Achievements
GOG
Know it all
Open the codex for the first time
60.7%
How to unlock the Know it all achievement in Harmony: The Fall of Reverie - Definitive Guide
The Cherished
TrueAchievements
TrueAchievements
You can unlock this immediately after starting a new game. Simply pause the game during the unskippable opening current and select Codex to unlock the achievement.