There are a maximum of 33 Half-Life 2 achievements worth 539
4,145 tracked gamers have this game, 618 have completed it (14.91%)
Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked by 1,619 tracked gamers (39% - TSA Ratio = 1.59)
Do you have a question about this achievement? Please post it in the Half-Life 2 Forum