These are almost always the same 5-10 blacklisted keys that have been used thousands of times. Even if they worked (they won’t), SCS Software or Steam will ban the key within hours.
It is vital to understand that When SCS Software issues a key for Euro Truck Simulator 2 , that key unlocks the game on the Steam platform. Once the game is in your Steam library, you own all versions of the game. You do not need a special key to unlock version 1.15.1 specifically; you only need a valid key for the base game. product key for euro truck simulator 2 version 1.15.1
If you need exactly version 1.15.1 for old map mods or ProMods compatibility, this works. Otherwise, just buy the standard up-to-date Euro Truck Simulator 2 key – it’s a better long-term value. These are almost always the same 5-10 blacklisted