In the career mode of the singleplayer, you start as an independent bus driver. At the beginning you invest your whole savings in a depot and a bus and you try to keep growing.
By completing tours in OMSI you earn money, which can be invested in new depots and buses. Additionally you need money for the maintenance of your buses.
By accomplishing tasks, which are adjusted individually to your career and by driving substitute tours you can earn career points (CP). These are needed to expand your company and effects your earnings positively.
In the singleplayer there is also a ranking list where you can compete with other players.
Who will be the number 1 with his career?