Combine

The Combine was the main opposing force in the game Half-life 2 created by Valve. The Combine were made up of multiple different universes set across different dimensions, made up of countless amounts of different species, thus the reason why it's named "Combine," meaning the combination of all species. The Combine were known for conducting inhumane experiments on many different creatures, and had various devilish torture methods. Through the game of Half-life 2, you come across a variety of Combine bioengineered creatures (Named Synths) and their Combine Soldiers (Dr. Breen refers to them as the "Transhuman Forces of the Combine"). The Combine Soldiers had a variety of armor that mainly served no other purpose then to display their rank in the Transhuman army. Other variants of Combine soldiers were "Civil Protection" or "Metro Police" which were the main police force of City Seventeen. The Synths varied as well. A brief list of the Synths known in Half-life 2 are Striders, Hunters (From Half-life 2: Episode 2), Combine Dropship and Combine Gunship. All Synths previously listed are encountered in game. The Combine on Earth was originally lead by Dr. Breen, but superior to Dr. Breen was an "Advisor" which is an unknown figure that seems to keep in contact with Dr. Breen often.