This page features the small role playing allies that are on your side that you'll be playing alongside and etc in Half-Life 2.
The remaining remenants of humanity, citizens of City 17 are experiencing an oppressive time. Throughout the game, you will meet various types of citizens. Some who are willing to help you, others who are not. Keep an eye out for them.
Once an alien slave in the original HL and against you, ever since the Vortigaunts have been freed of slavery, they have chosen
to be on your side in HL2 and help you, and your friends out where needed, fortunately.