Source: Ars Technia
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The problem with writing in games is that we point out when it's terrible, but we don't praise it enough when it's good. Consider Half-Life 2.
In the beginning of the game, you're just another desperate citizen pushed through processing before entering the city. People around you are muttering, and if this is your first time playing, you'll likely amazed by the graphics and the Source engine. It's beautiful. Then the megascreen on the building pops up and Dr. Breen appears to explain why the aliens have taken away our ability to reproduce. The quality of the writing makes it worth quoting at length.