If you were reading an article with that title, it was likely discussing one of three things:
For the authentic experience, the game is officially available on major platforms: Available via the Rockstar Games Launcher or Steam.
Web-based emulators or "fan-made" versions that mimic the game's aesthetic in a highly simplified 2D or basic 3D format to bypass network filters.
The user lands on a page plastered with ads for "VPNs," "Survey Sweepstakes," or "System Cleaners." A giant play button leads not to a game, but to a chain of pop-unders and malicious redirects. The actual RDR2 is never offered. The promise is the product.