Half-life 2: Episode one

Part one of Half-life is to help your hero's travel throughout City 17. You should complete other objectives. The soldiers of the Alliance should be defeated. The Resistance are trying to fight back from the power of the Alliance with this sequel to Half-life. The hero must get into the Citadel so the blast is not as catastrophic as it will be. Put agravity gun on your way and destroy enemies. Translating: control different objects.