CSGO Weapon Cases The case for the CSGO weapon is a unique drop that opens using the key. They were introduced by the Arms Deal Update on August 14th 2013. The cases include gun skins created by Valve and knife skins designed by the community. The first Chroma Case contained the AWP Howl and Vulcan skins, as well as the Redline knife. It also contained the infamous PP-Bizon
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