Funny enough, most of the badass cosplayers weren't even videogame related. Case in point: This Buzz Lightyear costume. What's also becoming pretty great is that videogame companies are integrating professional level cosplaying. The Lollipop Chainsaw, Journey and BioShock Infinite booths had some great cosplayers.
Then there's this random X-COM display was just placed in the middle of the convention floor. So yeah, PAX keeps getting better cosplayers and I'm all for it!
*Thanks to community member Joy for taking all of these pictures.