Official Confirmation
Both the PlayStation description and Steam page identify Unreal Engine 5. Steam also emphasizes motion capture used to recreate martial-arts techniques.
What the Engine Tells Us
It identifies the underlying technology and helps explain the game's detailed environments, animation pipeline, and current-generation presentation. It does not confirm which Unreal Engine features are enabled in the shipping build.
What It Does Not Confirm
Unreal Engine 5 alone cannot determine frame rate, shader compilation behavior, ray tracing, Lumen, Nanite, upscaling, storage needs, or Steam Deck performance. Those depend on implementation and optimization.
PC Buying Advice
Ignore “estimated requirements” presented as official. Wait for S-GAME or Steam to publish minimum and recommended specifications, then compare them with the PC requirements guide.