You and your father as well as a skilled doctor and scientist are among those people who have survived after the events of the first part of the saga called Half Life. This title is a chapter called Alyx and it is a continuation of the first story that gradually leads us to the second one. So this is kind of a sequel and prequel at the same time. The game developers did their best to create the playing process variable and interesting, since shooting and fighting are not your only options here. You will also have to learn your enemy from top to bottom.