Noise Frags are tokens you obtain from defeating a virus when you have 100%+ noise, or from defeating a G virus. You can trade these Noise Frags to a merchant in Noise Wave1 for various cards, including a Giga card.(Note, you have to be at a certain point in the game to trade noise frags).
Related ThreadsNoise Frag - last post by @ Dec 30, 2009
Noise Frags - last post @ Nov 18, 2009
noise frags? - last post @ Jul 20, 2009
Noise Frag - Where to use them - last post by @ Jul 5, 2009
Noise Frag Trader - last post by @ Jun 8, 2010