Watch Dogs - Welcome to Chicago Trailer - Watch Dogs

This 2014 main game is an action-adventure shooter set in a hyper-connected Chicago where the Central Operating System (ctOS) controls all technology. You play as Aiden Pearce, a hacker seeking revenge, whose core gameplay loop involves manipulating the city's digital infrastructure—like traffic lights and security cameras—to fight enemies and navigate the open world. Its distinctive feature is the deep integration of hacking as a primary tool for combat, stealth, and environmental puzzle-solving across multiple platforms.