Actually, in my opinion, as far as Civ games go the defining game is the original because, well, duh!
Another problem I had with the list was calling RE2 a survival horror game, as I've always felt that RE games, despite all their qualities, were never really horror games in the same way that Silent Hill or SS2 were.
Also, a few sentences really struck me as dumb:
"Half-Life is, and still remains, the shining example of what can be done with the FPS genre not only in terms of narrative storytelling but in terms of overall design."
"Yes, we know hardcore PC RPG nuts will no doubt lament the choice of Fallout over other notable titles like Oblivion"
Gah!