If you fail to exit that sweep, the police will then appear and chase you in the typical GTA 4 style. Instead of cops patrolling the city, civilians must now phone in suspicious activity, which triggers a scanner sweep. The modders have implemented the Watch Dogs ctOS police scanner. Perhaps the most interesting change is to #WatchDogsIV's police. Aiden even whips out his phone when he hacks objects. This is more than just a skin - the new model also changes walking and running animations, idle animations, and more.
You can also change your character model to Aiden, the protagonist of Watch Dogs. Traffic lights can be switch from red to green, barriers can be raised at various intersections, and cameras can be used to look around the city. You can walk around Liberty City hacking into various electronic objects. Once all is said and done, what do you get? The most obvious addition is the hacking.