ETS2 is frequently on sale for just a few dollars on Steam. The official version automatically updates to the latest content (we are far beyond version 1.15 now!), including huge map expansions and new trucks.
Pirated or repacked versions frequently suffer from corrupted .exe files, leading to crashes or missing content. Euro Truck Simulator 2 1.15.1 Activation Key REPACK
Genuine activation keys for Euro Truck Simulator 2 are provided only through official purchase channels: ETS2 is frequently on sale for just a few dollars on Steam