In order to get playable performance a high end but old GPU such as the GTX 470 and a 2nd generation Intel i3 processor. For optimal experience a powerful i5 or an FX octa core is recommended along with modern mid range new GPU with 2GB of Video memory. For Mac systems the requirements are a bit higher and especially the RAM.
Become a bus driver and manage your own company in a huge open city. Be as punctual as possible and follow the rules to unlock new areas, buses, customisations and much more