Nvidia's remastering more classic PC games to add ray tracing - Polygon

Nvidia’s Lightspeed Studios team is working on "an exciting new game remastering program" that will add ray-tracing support to classic PC games, a la Quake 2 RTX.

Quake 2 remaster hinted at by Steam updates ahead of Quakecon

The highlight of Quake 2's remaster is an intense new campaign from the Wolfenstein devs

Free ray-tracing update will overhaul Portal's graphics on December 8

How long has ray tracing graphics technology been around? - Quora

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Half-Life mod adds real-time ray tracing to Valve's seminal first-person shooter

Remedy Entertainment - Wikipedia

RTX Remix Could Revolutionize Modding, Even If It's Not Compatible with DX10+ Yet

Could Raytracing be implemented for MCC on XSX? Even just as a toggle option? : r/halo

Quake II RTX Updated with More Sharper Textures and Better Lighting Effects

Portal RTX announced, a Portal remaster with ray-tracing ! Portal RTX is coming this November, free for current owners. : r/Portal