The chroma case was added to the game in the January 8th 2015 update. In the update there were 14 community-designed weapon skins added, which can be opened in this container. Players who open the chroma case also have a chance to get a special rare knife skin, each with one of the twelve possible finishes.
To open the chroma case, you need to first get the chroma case key. You can buy it in the in-game store, or trade for it with other players.
When you open the chroma case, you have a chance to receive one of the following weapon skins:
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