Half Life 2 Episode 4 Trying To Escape

This is half life 2, half life 2 is a game where an infection has claimed the earth and very few people are left in the world to fight off the virus. if you want a more in detail explanation of the game here is where you can read on it and see if you want it your sleff. http://strategywiki.org/wiki/Half-Life_2/Plot_summary