Fatekeeper's engine has not been officially confirmed by Paraglacial. Pre-launch dev material does not enumerate the engine in plain text, and press-kit framing is oblique. The team has emphasized that, despite a small headcount of thirteen developers, the project benefits from a modern third-party engine commonly used for first-person action titles, with tooling and rendering that let the game look closer to a larger-studio production than its budget would suggest.
Why it Matters

Visual fidelity. Lighting, environmental detail, and physics-driven effects benefit from recent feature additions in modern engines.
Animation weight. Pre-launch combat footage relies on a robust animation pipeline to give swings their distinctive heft.
Iteration speed. A small team needs an engine that lets them prototype quickly; the studio's chosen technology supports that pace.
Performance Status
Specific performance benchmarks and target frame rates remain unannounced, but official Minimum and Recommended hardware requirements are now published on the Steam page. See
System Requirements for the current official status.