Proton has made enormous strides toward game compatibility through advances in related technologies like DXVK, which enable DirectX 9, 10, and 11 games to run through the Vulkan API. In fact, the project is so far along that Amazon has thrown its hat in the ring, working toward streaming Proton enabled games through Luna. Today they crossed a major milestone as user reports on the site reveal that 80% of the top 100 games on Steam now run on Linux, and by extension, Steam Deck.