Official specs from Steam

Death's Door system requirements

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

Minimum

OSWindows 10 x64
ProcessorIntel Core i5-8250U (4 * 1800) or equivalent; AMD Phenom II X4 965 (4 * 3400) or equivalent
Memory8 GB RAM
GraphicsGeForce MX 150 ( 2048 MB); Radeon R7 260X (2048 MB)
Storage5 GB available space

Recommended

OSWindows 10 x64
ProcessorIntel Core i5-4670K (4 * 3400) or equivalent; AMD FX-8350 (8 * 4700) or equivalent
Memory8 GB RAM
GraphicsGeForce GTX 1050 ( 2048 MB); Radeon RX 580 (8192 MB)
Storage20 GB available space

FAQ

What graphics card do I need for Death's Door?

Minimum: GeForce MX 150 ( 2048 MB); Radeon R7 260X (2048 MB). Recommended: GeForce GTX 1050 ( 2048 MB); Radeon RX 580 (8192 MB).

How much RAM does Death's Door need?

Death's Door needs 8 GB RAM at minimum, 8 GB RAM recommended.

How big is Death's Door?

Death's Door requires 5 GB available space.

Does Death's Door run on Mac or Steam Deck/Linux?

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