Official specs from Steam

Returnal system requirements

Minimum and recommended PC specs as listed by the developer on Steam.

Minimum

OSWindows 10 64-bit (version 1903)
ProcessorIntel Core i5-6400 (4 core 2.7GHz) AMD Ryzen 5 1500X (4 core 3.5GHz)
Memory16 GB RAM
GraphicsNVIDIA GeForce GTX 1060 (6 GB) AMD Radeon RX 580 (8 GB)
Storage60 GB available space
Additional NotesSSD Recommended

Recommended

OSWindows 10 64-bit (version 1903)
ProcessorIntel i7-8700 (6 core 3.7 GHz) AMD Ryzen 7 2700X (8 core 3.7 GHz)
Memory16 GB RAM
GraphicsNVIDIA RTX 2070 Super (8 GB) AMD Radeon RX 6700 XT (12 GB)
Storage60 GB available space

FAQ

What graphics card do I need for Returnal?

Minimum: NVIDIA GeForce GTX 1060 (6 GB) AMD Radeon RX 580 (8 GB). Recommended: NVIDIA RTX 2070 Super (8 GB) AMD Radeon RX 6700 XT (12 GB).

How much RAM does Returnal need?

Returnal needs 16 GB RAM at minimum, 16 GB RAM recommended.

How big is Returnal?

Returnal requires 60 GB available space.

Does Returnal run on Mac or Steam Deck/Linux?

There is no native macOS version. There is no native Linux build (Proton compatibility may vary).