Short answer

Panache Digital Games develops and publishes 1666: Amsterdam. The official Steam page describes Panache as the independent studio founded by Patrice Désilets and identifies it with Ancestors: The Humankind Odyssey.

What the published information confirms

Panache's official description classifies the title as narrative third-person action-adventure and directs players to its support community. Feature videos are presented by Panache co-founders and producers while explaining the Zaindaris, Noa, Aaron, and the day-night structure.

Credits beyond the studio

The studio credit does not identify every individual contributor, performer, technology choice, or external partner. The cast guide therefore covers confirmed characters without guessing performer names that do not appear in the current credits material.

What to do next

Use Panache's game page, Steam news, and the studio's official feature videos for development updates. Attribute the game to Panache Digital Games in both developer and publisher fields unless a current official storefront later changes that credit. The studio's own channels are also the safest place to confirm future credits.

Creative and studio context

Steam's official description notes Désilets' earlier creative-director work on Prince of Persia: The Sands of Time and Assassin's Creed. That background helps explain comparisons to historical action-adventure games, but 1666: Amsterdam is presented as a Panache project rather than an Ubisoft release.