IGN takes a closer look at Portal.
"The game itself is looking like the next evolution in puzzle games. You thought 3D Tetris was mind-blowing, wait until you see Portal. For those who haven't been following Portal, the concept is fairly simple. You have a modified version of the grav gun. It can lift items, but can't shoot them forward. That's okay, because this new gun has a much more useful feature. Aim and shoot at any area (with exception of resistant black-padded walls) to create an entrance and then an exit portal. You can move through these portals or send other objects."
Today, Portal with RTX is being upgraded with DLSS 4 with Multi Frame Generation, multiplying framerates, as well as the transformer model for Ray Reconstruction and DLAA, enabling even better image quality. Portal with RTX is also adding RTX Neural Radiance Cache (NRC), a neural shader that improves indirect lighting, as well as a bevy of performance optimizations.
A gameplay demo of the cancelled Portal prequel F-Stop using recreated assets features no portals, and a unique camera that duplicates items.
From GamesReviews:"Portal with RTX is a fresh look for the 2007 classic. But it's not easy to run, and the results may not impress everybody."
looks ok