I'm working on my Chell cosplay (with my friend as Cyborg/Android Glados) and all I have left is the wig and shoes. Since she wears a relatively low ponytail, I'm thinking I can just manipulate a thinner wig into one, since her hair is kinda thin and wispy. As for the boots, what has everyone else been doing? They seem pretty difficult to get right and accurate, and I've seen a lot of different things...
I plan on making a light up Wheatley though! That'll be fun!