The Black Ops II story will be branching—it will feature choices and variable outcomes. Wait, what? Yep.
At one point, players had an option to either grab a sniper rifle and cover their squad, or rappel down to join up with them. Presumably that choice leads to a slightly different gameplay experience—this looks like one of the smaller of the choices offered in the game.
A large part of the branching will be due to Strike Force, which is a brand-new game mode featuring tactical, open-ended gameplay in sandbox-style levels.