Each program is an unique scenario with different objectives that must be accomplished, but the basic premises are the same. You must drive though a city and visit a series of hot-spots randomly scattered around the map, while staying alive and destroying enemy cars that cross your path. For example, in one of the programs, Zip Courier Service, your job is to earn money by picking up packages at various locations around the city and then delivering them to their proper locations. You win by earning at least the episode quota within the allocated time period. In another program, Granny's Wide Ride, your goal is to spread word of a secret alien invasion by driving to various spots in a city delivering packages, all the while avoiding the attacks of alien agents.
Streets also provides a racing module.
You must visit a series of checkpoints within the allotted time without being blown up by overzealous police officers. As you can see, the differences between the programs are quite superficial. The gameplay itself is quite rudimentary. You drive around the city completing your assigned tasks while avoiding enemy cars. As you purchase weapon upgrades to your car, you can also try to win back the streets by blowing away the competition.