If you specifically want to play a trucking game on the PPSSPP emulator, these original PSP titles are available: MotorStorm: Arctic Edge : Features a "Big Rig" vehicle class. Hard Truck: Apocalypse
Since there is no native PSP ISO, you can play the official game on mobile devices using or remote play : Euro Truck Simulator 2 Ppsspp Iso Zip File Download For
Drive heavy cargo trailers directly on your Android or iOS device. If you specifically want to play a trucking