The Chroma 2 Case is a weapon case added to the game in 2015 that contains 15 weapon skins, ranging from Mil-Spec Grade to Covert, with knives as its rare special item. SkinsMonkey lists every Chroma 2 Case skin with prices for each wear level.
The chroma 2 case was released as a part of a game update for CS2(CS:GO) on 15th of April, 2015. The weapon case contains 15 skins designed by the CS2(CS:GO) community, as well as a chance for the players to get one of the 5 possible knife skins in the special rare slot, with 12 different possible finishes each.
To open the chroma 2 case you must first get the chroma 2 key. You can buy it in the game store or trade for it with other players.
When you open the case added in this update, you get a chance to receive the following skins:
The 15 weapon skins from this container make up The Chroma 2 Collection, the set that counts in trade-up contracts. The knives it drops as rare special items belong to no collection.