This portal mod has you playing through the events of portal, But glados is busy with another subject. So, instead you are testing with a core named Eric who seems a bit too enthusiastic to test. (Features: New Chambers, New Testing Elements, New Characters. and Much more!)
"What are you doing over here? head back to the testing area!"
what program did you use to edit the cores skin? cool mod!
I extracted it using GCFScape, Turned it into a PNG with VTF edit and then edited it with Paint.net, turned it Back into a VTF and copied the VMT for the core texture, put it into the materials folder and viola, a custom reskin.
cool beans!!!!
Looks cool! I might try to make a Portal 2 themed version someday!