The creators of the new Infamous game didn’t hesitate to put their other big series, Sly Cooper, and its characters into the game as tiny easter eggs — among other funny things you might miss. They’re all around the city as graffiti.

Both pics via r/infamous
There are also a couple that are neon signs as opposed to graffiti.
Delsin’s ringtone is the Sly 4 theme too! So good.