Without this activation, the game would operate in a "Demo Mode," limiting playtime or features. This system was designed to combat piracy, but as SCS Software moved on to newer titles like Euro Truck Simulator 2
For legitimate versions of the game, activation codes are distributed through official channels: euro truck simulator 1 activation code and email patched
Many "keygen" or "patched" executables were wrappers for viruses. Without this activation, the game would operate in