Counter Surveillance was a series of neutral side missions in Infamous. Cole had to disable surveillance cameras that each district's gang had installed on a specific building. A concerned citizen would inform Cole about the threat and asked that he destroy them all.
These missions often involve some skillful climbing. The target buildings will be marked on your map by a glowing yellow circle, which will adjust depending on how many devices that remain. The devices are simple to spot by looking for glowing red lights as an indicator. When you get close enough to a device, press to disable it. Some devices will appear far away from handholds or poles that you climb on, meaning that you may have to slide along a way to get close to a device and disable it quickly before sliding too far.