A combination of two things I love! Ghostbusters and Portal (which I'm friggin' obsessed with). I came up with this when I decided that I'm cosplaying as Chell for the next Otakon. My brother,
normally does a Ghostbuster group with our friends for cons. I jokingly suggested I combine the two with the no-ghost symbol being inside the Aperture logo. I decided to actually make that, and here it is. It's my first attempt at Photoshop, so the quality isn't too wonderful. But not I'm seriously considering getting patches of this made.