Chell?
Actually, Zoey's looks have been based on Alesia Glidewell, too. Zoey probably wears makeup because she hangs out with three boys that need to rescue her from zombies, whereas Chell has only GLaDOS to hang out with, not exactly a great substitute for a conversational partner.
"Duct Tape is the answer."
And if that's not crazy enough, GLaDOS called Chell "unlikable" and even refused to name her, rather saying "<<Subject Name Here>>". 
Because you can be sure that when a plague is destroying the world, governments are collapsing, the social order is being toppled, and cities are becoming pitfall-filled war zones, cosmetics will always reign supreme.
...Makes sense, right?
Now with 100% more inline comments!
...Makes sense, right?
Zoey and the three guys are the only survivors of the world. A plague has already destroyed the world, governments are already collapsed, the social order is already toppled and cities are already pitfall-filled war zones. The cosmetics that "will always reign supreme" is nonsense, because everything is about survival.
Ahhmmm...I was being a bit facetious. I do know the premise of L4D, and I was simply trying to emphasize the humorous nature of Ricotez' comment. I sincerely doubt that, in the event of a plague-like infection, cosmetics would have a very high priority.
For the record, Ricotez, I wasn't trying to insult your comment or anything; please don't interpret my response to your comment as a sarcastic rebuttal.
Now with 100% more inline comments!
I actually was being sarcastic. By the way, they're not the only survivors. L4D2, anyone?
"Duct Tape is the answer."
L4D2: the survivors manage to reprogram zombies back into free-thinking humans.
I quess I won't have to play that one since I know what happens now.
You're in luck. I bet when L4D2 is released, it will be as finished as L4D, but twice as expensive.
Sounds about right.