Official specs from Steam

Ultrakill system requirements

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

Minimum

NoteRequires a 64-bit processor and operating system
OSWindows 10
Processor2.4 GHz Dual Core Processor Or Higher
Memory4 GB RAM
GraphicsGeForce GTX 560 Or Equivalent
DirectXVersion 11
Storage3 GB available space
Sound CardNo vocal interface detected.

Recommended

NoteRequires a 64-bit processor and operating system
OSWindows 11
Processor3.1 GHz Quad Core Processor Or Higher
Memory8 GB RAM
GraphicsGeforce GTX 970 Or Equivalent
DirectXVersion 12
Storage3 GB available space
Sound CardYet I must scream.

FAQ

What graphics card do I need for Ultrakill?

Minimum: GeForce GTX 560 Or Equivalent. Recommended: Geforce GTX 970 Or Equivalent.

How much RAM does Ultrakill need?

Ultrakill needs 4 GB RAM at minimum, 8 GB RAM recommended.

How big is Ultrakill?

Ultrakill requires 3 GB available space.

Does Ultrakill run on Mac or Steam Deck/Linux?

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