I actually think that Alyx's body is quite well-proportioned. Her body isn't like that of Lara Croft or Ada (in Unreal), or Cate Archer from NOLF series, or Valerie Cortez from FarCry.

Lara Croft is the epitome of mal-proportion. Her abdomen is so thin that the only realistic way to achieve that is to have a few ribs resected and a lobe of liver removed.

I think you people are looking in the wrong direction for misproportioned video game heroines. You shouldn't look at supermodels or real girls you know. You should look at comic books. This is what all those concept artists were involved in prior to the advent of highly graphicalized video games. And comics have always been known for women with rather oversized breasts. But this exaggerated sexuality is not limited just to the women, look at the ahnold-style pects and shoulders that adorn nearly every single male.

Why the exaggeration? Is it a representation of loner-inspired hypersexuality? No. The answer is simple - it makes for a more dynamic figure that is more interesting to draw and view. Find your favorite superhero comic cover, and then imagine the characters in the same poses with actual human-shaped bodies. It just wouldn't hold the same compositional merit.

The huge difference: the movement involved with a 3D character has always been kind of blocky, and only recently has the engine technolog developed to the point to where this exaggerated human style of character can even get close to taking on the dynamic poses that inspired the form in the first place. Honestly, a dexterity reminiscient of C3PO is not sufficient to take advantage of the stylized body frame.

alyx mis-proportioned? i wouldnt say so. her breasts are a little oversized but one does get that in life. for example there is a girl in my school who has a similar figure.