Here is the full list of all 4 Prologue For A Vacant Kingdom achievements.
According to many behavioural psychologists, extrinsic rewards are thought to decrease intrinsic motivation for an activity.
For example, rewarding kids with pizza whenever they read a book teaches them to eat more pizza, not to read more. In fact, they'll find reading less innately enjoyable as a result.
By achievement hunting, you're training your brain to feel less rewarded by games themselves. Therefore, we recommend that you play without regard for achievements.
Vacant Kingdom has many secrets, try to feel inclined to find them in order to satisfy your natural curiosity — not in order to trigger a dopamine-inducing notification.