There is no permanent, official free full version of the AAA survival horror game The Callisto Protocol .
The game is a paid title developed by Striking Distance Studios. While it was previously featured as a limited-time free giveaway on the Epic Games Store (such as in August 2024 and December 2025), those promotions have ended.
Digital storefronts routinely offer deep discounts of 50% to 80% off during major summer, winter, and publisher sales events. 🖥️ Official PC System Requirements