OMSI 2 is a paid game, so there is of the full base game. It is primarily available for purchase through platforms like the Steam Store .
If you are looking to enhance your simulation experience without spending extra money, the community offers thousands of free features through the OMSI WebDisk : OMSI 2: Steam Edition OMSI 2 Free Download
However, "Free Download" in the OMSI community usually refers to the massive library of created by players. Freeware and Features OMSI 2 is a paid game, so there is of the full base game