The Enhanced version utilizes DirectX 11 , offering better stability and compatibility with modern GPUs. Legacy remains on DirectX 9 , which is better for older, low-end PCs or integrated graphics.
This mode uses the older DirectX 9 engine. It is included primarily for users with older hardware or specific driver incompatibilities that prevent the Enhanced version from running smoothly. Key Improvements in the Anniversary Edition Titan Quest Anniversary Edition Enhanced Vs Legacy