Biker, also known as Helmet or Hacker, is the deuteragonist of Hotline Miami and a side character in Hotline Miami 2: Wrong Number. He is a former 50 Blessings agent.

He appears as the boss enemy of Part Two: Questions, where he is encountered at the end of chapter seven, "Neighbors", and returns later in the game as a playable character after Jacket's storyline is finished. An older version of him appears in the sequel.