: Avoid "serial number" generators or pirated keys from unofficial sources. These often contain malware and violate the game's license, which may result in activation failures or security risks to your PC. Omsi Bus Simulator V100 Download - Facebook
If you have installed the game on multiple computers, you may reach an activation limit. You might need to contact Aerosoft Support to reset your hardware ID. Steam Migration: omsi bus simulator v1.00 serial number