Gender: Male • Personality: Gordon is the ultimate silent protagonist. He never speaks, which allows the player to fully project themselves into his character. He is a brilliant MIT-educated theoretical physicist who is calm under pressure, transforming from a scientist into a legendary warrior for the Resistance. • Introduction: Originally a research associate at the Black Mesa Research Facility, Gordon became the hero of humanity after surviving the "resonance cascade." Known as the "Free Man," he wears the iconic HEV Suit and is famously associated with his signature weapon: the crowbar. Isaac team.

Gender: Female • Personality: Brave, witty, and incredibly resourceful. Unlike the silent Gordon, she is highly expressive and empathetic. She is a mechanical genius who maintains a optimistic spirit even in the dark world of City 17. Isaac team. • Introduction: The daughter of Dr. Eli Vance and a prominent figure in the Resistance. She fights alongside Gordon with her signature pistol and her robotic companion, Dog. • The Secret: While she maintains a professional partnership, her playful teasing and deep concern suggest she has a secret crush on Gordon. Her father often embarrasses her by hinting at "grandchildren," making their unspoken bond a famous part of the story.

Gender: Male • Role: An eccentric Black Mesa survivor and brilliant scientist. • Traits: He leads the Resistance and loves his pet headcrab, Lamarr. He provides Gordon with the upgraded HEV Suit and technical support. Our team.

Gender: Primarily Male (Human volunteers) • Personality: Cold, brutal, and authoritative. They are ordinary humans who joined the Combine for better food and living conditions. They enjoy bullying citizens and show no mercy while enforcing the law in City 17, hostile. Not our team.