In Rainbow Six Siege, small tactical choices always lead to big consequences. Every round is a new lesson in what you could have done better, with your mistakes acting as a stern teacher. Taking these lessons to heart and adjusting your team's strategy accordingly keeps each match feeling fresh and exciting, and a drip-feed of new operators, loadouts, and abilities constantly introduces new considerations. The thrill of seeing your plan succeed--whether that's a collection of traps that stops the enemy in their tracks, a well-placed breaching hole that sets the stage for an ambush, or two operators' abilities working together to pull the rug out from the opposing team--is what makes Siege not only a compelling shooter but one of the best examples of teamwork, tactics, and crack shooting out there.
Despite its evolution over the past four years, Rainbow Six Siege has always been a battle between attackers and defenders over a single objective. There are five operators per team, each with their own special gadgets that can be used to slow the attackers' assault or poke holes in the defenders' fortifications. Every round, attackers need to move in on a specific objective; depending on the mode, they'll need to sneak in and extract a hostage, create a pathway to secure a specific room, or strategize carefully to defuse a bomb. Bomb is the quintessential Siege mode, as it makes every operator feel viable and balanced. Pushing the objective, finding an opening to plant the defuser, and then protecting said defuser gives the attacking side a steep, rewarding climb to victory, and it's the defenders' job to knock them down and keep them from reaching that summit.