Skins from The 2021 Train Collection are only available for purchase for Operation Riptide Premium Pass holders.
The 2021 Train Collection is a Valve-made collection of CS:GO skins introduced on 22 September 2021. The collection consists of 0 consumer skins, 0 industrial skins, 7 mil-spec skins, 5 restricted skins, 3 classified skins, and 2 covert skins.
The 2021 Train collection is the successor to the Train collection which was introduced nearly eight years prior on 27 November 2013.
CS:GO skins from this collection can be obtained by spending stars in the Operation Riptide shop. One star can be redeemed for a Mil-spec skin, four stars for a restricted skin, 20 stars for a classified skin and 100 stars for a covert skin.