They are encountered throughout Half-Life 2 and its episodic expansions, as well as Half-Life: Alyx, as hostile non-player characters as the player progresses through the games in an effort to overthrow the Combine occupation of Earth. The Combine consist of organic, synthetic, and heavily mechanized elements. The Combine ( / ˈ k ɒ m ˌ b aɪ n/ COM-byne) is a multidimensional empire which serves as the primary antagonistic force in the 2004 video game Half-Life 2, and the subsequent episodes developed by Valve.
