rFactor 2 uses Steam’s built-in DRM plus additional integrity checks. Many DLC unlockers fail after game updates (which occur regularly) because the protected binaries change.
Using such tools carries significant risks for the user and their account: rfactor 2 dlc unlocker
The DLC Unlocker works by modifying the game's files to unlock all the DLC content. The process is relatively straightforward: rFactor 2 uses Steam’s built-in DRM plus additional
This write-up covers the nature, risks, and implications of using a DLC unlocker for What is an rFactor 2 DLC Unlocker? rfactor 2 dlc unlocker