After Soap’s death, Price is out for revenge. (Modern Warfare 3)

Price is no longer the man you knew. You're an SAS sniper assigned to him as backup while he hunts down Makarov. He doesn't talk much, but you can see the anger eating away at him.

In a quiet moment before you infiltrate a high-rise building in Prague, he says quietly "Do you know why I brought you along? Because you remind me why we fight. And I need that now more than ever."