DirectX 12 is the backbone of modern gaming on Windows 10, designed to bridge the gap between your hardware and the software you run. ⚡ The Performance Boost
: This is the closest official "offline" package available. It contains many legacy runtime components for older games but include or update DirectX 12. Official Microsoft Offline Redistributable How to Check Your Current Version directx 12 windows 10 64 bit offline installer link
While this doesn't "install" DirectX 12 (as it's already in the OS), it adds legacy libraries (DX9, DX10, DX11) required by many older games. You can find this on the Microsoft Download Center . DirectX 12 is the backbone of modern gaming