According to the first trailer for the GTC, it was actually planned for November, but the ray tracing new edition of Portal aka “Portal with RTX” will now be launched on December 8th, as Nvidia announced today. The system requirements are very high: For 1080p60 you already need a GeForce RTX 3080 with active DLSS 2, for 4K even more.
Portal with RTX is planned as a free DLC for all Portal owners and can already be added to the wishlist on Steam. The ray tracing new edition was created with the RTX Remix modding tool presented at the GTC, which is supposed to automatically polish older games and provide them with higher-resolution textures and features such as ray tracing. RTX Remix is to be offered as a free tool for the community and will also run on older graphics cards apart from the new RTX 4000 series (test).