Official specs from Steam

Back 4 Blood system requirements

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

Minimum

NoteRequires a 64-bit processor and operating system
OS64-bit Windows 10
ProcessorIntel Core i5-6600 (3.3 GHz) OR AMD Ryzen 5 2600 (3.4 GHz)
Memory8 GB RAM
GraphicsNVIDIA GeForce GTX 1050 Ti OR AMD Radeon RX 570
DirectXVersion 12
NetworkBroadband Internet connection
Storage40 GB available space
Additional Notes1080p / 60fps / Low Quality Settings

Recommended

NoteRequires a 64-bit processor and operating system
OS64-bit Windows 10
ProcessorIntel Core i5-8400 (2.8 GHz) OR AMD Ryzen 7 1800X (3.6 GHz)
Memory12 GB RAM
GraphicsNVIDIA GeForce GTX 970 OR AMD Radeon RX 590
DirectXVersion 12
NetworkBroadband Internet connection
Storage40 GB available space
Additional Notes1080p / 60fps / High Quality Settings

FAQ

What graphics card do I need for Back 4 Blood?

Minimum: NVIDIA GeForce GTX 1050 Ti OR AMD Radeon RX 570. Recommended: NVIDIA GeForce GTX 970 OR AMD Radeon RX 590.

How much RAM does Back 4 Blood need?

Back 4 Blood needs 8 GB RAM at minimum, 12 GB RAM recommended.

How big is Back 4 Blood?

Back 4 Blood requires 40 GB available space.

Does Back 4 Blood run on Mac or Steam Deck/Linux?

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