The official free entry is the 1666: Amsterdam Prologue. Panache presents it as the beginning of Noa's journey, while the paid product is the separate PC Early Access release on Steam and Epic Games Store. Calling the Prologue the playable demo is understandable, but Prologue is the official name.
What the published information confirms
Panache explicitly invites players to discover the 1666: Amsterdam Prologue for free and describes it as the beginning of Noa's path. The same official page separately promotes the paid PC Early Access release, which prevents the two offerings from being confused.
Playtime and save-transfer status
The download description gives no fixed demo length, completion estimate, or feature checklist. It also makes no save-transfer promise, so choose the Prologue to sample the opening rather than assuming its progress will move into Early Access.
What to do next
Use the free Prologue when your goal is to see the premise before buying. Use the Steam or Epic Games Store listing when you want the Early Access build, and verify any account, save, or download details on the chosen storefront itself.
Prologue versus Early Access
The Prologue is designed as an introduction: Noa takes on the Collector role, begins a mystery that crosses centuries, and chooses the companion who will travel with her. The paid Early Access version continues beyond that introduction and is sold as an unfinished build that will grow through major updates.
What the official pages do not promise
The available official material does not promise save transfer from the Prologue, a fixed Prologue playtime, or permanent availability on every storefront. Download it to sample the premise, but verify the current store page before assuming progress or settings will carry into the paid build.
