Short answer

Buy the PC Early Access version from Steam or the Epic Games Store. Panache lists both storefronts. The free Prologue is a separate introductory download and should not be confused with the paid Early Access product.

What the published information confirms

The official page links the PC Early Access offer and dates it to August 25, 2026. Steam has an active product page with Panache Digital Games listed as developer and publisher and with the standard Early Access disclosure.

Prices and regional terms

Prices, discounts, bundles, refund terms, and regional availability can change. Compare the final total and refund rules inside your own Steam or Epic account instead of relying on an old sale banner or a price shown for another region.

What to do next

Compare the live Steam and Epic listings in your region, read the current Early Access notes, and purchase from the storefront whose account and refund rules you prefer. If you are undecided, start with Panache's free Prologue instead of buying on assumption.

Choose a storefront

Choose Steam if its listed controller, cloud-save, language, and Family Sharing features match your setup; choose Epic if that is your preferred PC library. The game content is sold as Early Access on both according to Panache, but account features and refund handling belong to each store.

Check the live total

Prices and promotions are time-sensitive, so this guide does not freeze a sale price into evergreen copy. Open the official store page, confirm that the product is 1666: Amsterdam rather than the free Prologue, and verify the Windows requirements before payment.