While there are no shortcuts, you do have a few viable paths forward:

RedM is a custom, dedicated multiplayer modification framework managed by Cfx.re—the same team behind the widely popular GTA V modding client, FiveM. Because it facilitates community servers and extensive modding infrastructure, it relies on several layers of security and validation that cracked games simply cannot bypass. 1. Digital Rights Authentication (DRM)

The short answer is . You cannot play RedM using a standard cracked copy of Red Dead Redemption 2.

If you attempt to link a modified game file to a legitimate Social Club or Steam account, Rockstar may permanently ban your official account from all online services.

You do not need to buy the full story mode. You can purchase the cheaper Red Dead Online standalone version from Steam, Epic, or Rockstar.

RedM essentially opens the door to a limitless frontier of custom content, far beyond the scope of the official multiplayer experience.

RedM is constantly updated to support the latest version of RDR2. Cracked games are often stuck on older versions, making them incompatible with the updated RedM client.

From a technical standpoint, the ownership check is a core function and cannot be bypassed or removed. The RedM team has clarified, "Since we can't remove this check legally, and Rockstar does not provide an alternative API, new players therefore can't play RedM".

A cracked single-player exe is not designed to handle this. Even if you bypassed one check, the network protocols would fail within seconds.

To ride the trails in RedM, you don't necessarily need the $60 "Ultimate Edition." You have a few options:

This comprehensive guide explains the technical reasons behind this limitation, how RedM’s authentication works, and the safest ways to get into Red Dead Roleplay. Why RedM Does Not Work with Cracked RDR2