You take on the role of research scientist Gordon Freeman in Half-life 2, who happens to find himself on an alien-infested Earth that is being torn apart, its resources being depleted, and its population dwindling.

And Gordon Freeman might just be the right man for the job. What they require are some push and encouragement. The people are on the verge of total revolt. However, resistance is stirring in the dark a vast network of railroads that are underground has been put in place. Gordon leads the resistance to free humankind with the help of some good creatures he liberated from Xen. Gordon joins forces with resistance fighters such as Dr Wallace Breen and a few of his old friends from the Black Mesa research facility like Barney Calhoun from HalfLife: Blue Shift. People are drawn to it so that they can have this feeling of being part of something bigger than themselves and can get away with torturing, physically abusing and killing civilians. The Combine Overwatch are people who are part of a military that is somewhat voluntary and whose membership is rewarded with many advantages like comfortable living conditions, concentration camps, urban centres, and controlled prisons. As a result, humankind is now almost enslaved by themselves The alien empire keeps an eye on its human subjects from a big fortress known as the Citadel, whose human governor happens to be Gordon Freeman's former administrator, by the name Dr Wallace Breen. Gordon Freeman wakes up on a train bound for City 17, one of an unknown number of 'urban centres' where this mysterious alien race keeps humans in an Orwellian pseudo-slavery.

Unfortunately, during his stasis, the aliens known as Combine put the world into enslavement and devoured its resources. Immediately after, he was put into a long sleep by a mysterious figure named G-man. After he created this portal, Gordon freed an alien race enslaved on their planet, Xen. These aliens entered the earth through a portal Gordon created alongside his employer. Gordon was awakened from a long sleep to help rescue the world from an invading alien force known as 'combine'. But, in case you're wondering, it's a show-not-tell story. It's a game story game that you would find addictive. Half-life 2 is a part of the Half-life game series.

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