To unlock all cars in Need for Speed Payback without completing the career mode, the most effective "better" method involves using a combination of the Frosty Mod Manager and specific car-unlocker mods
Most NFS Payback trainers (like from CheatHappens, MegaGames, or WeMod) offer: nfs payback unlock all cars trainer better
However, there are two major types, and neither is good news: To unlock all cars in Need for Speed
When using a trainer to unlock all cars in NFS Payback, keep the following tips and precautions in mind: or WeMod) offer: However