Yes, you do need an active PS Plus subscription in order to play MW3 online. Just like previous Call of Duty titles, PS Plus is required to access the Multiplayer and Zombies modes. Modern Warfare 3 does include some offline content that is playable without a PS Plus subscription, much like MW2.

Unfortunately, Chrissy was the first victim of the first Hawkins Lab test subject, Vecna, as a result of her bulimia and suffering at the hands of her abusive mother. Her death drove Jason on a path of vengeance, believing Eddie Munson had sacrificed her as part of his allegedly satanic games.

Instead of being stricken by the death of a loved one like Max was, Chrissy's trauma stems from her troubled home life. She endures constant body shaming and emotional abuse from her mother Laura, which eventually drives Chrissy to bulimia a development revealed when Max crosses paths with her in the bathroom.