flash.png: Muzzle Flares From PixelVFX tinyurl.com/PixelVFX

shot.wav: http://freesound.org/people/tehlordoswag420/sounds/240377/
dryfire.wav: http://freesound.org/people/Nanashi/sounds/104412/
pickup.wav: http://freesound.org/people/mbx448/sounds/256896/
portal.wav: http://freesound.org/people/couchHero/sounds/168910/
portal_enter.wav: http://freesound.org/people/Robinhood76/sounds/330724/