Half-Life 2 - Dog

Dog is a hulking robot belonging to Alyx Vance, built by her father Eli to provide both companionship and to protect her. Alyx subsequently upgraded the robot into its current form. Despite its name, Dog is anthropomorphic in appearance. Dog provides support to Freeman during training with the Gravity Gun, and makes appearances several times after.

1. Robot - A robot (also called a droid) is a machine - especially one programmable by a computer - capable of carrying out a complex series of actions automatically.

2. Anthropomorphic - Anthropomorphism is the attribution of human traits, emotions, or intentions to non-human entities.