In August 2013, Valve added a container called the CS:GO Weapon Case to a game that had been out for less than a year. It held a handful of weapon finishes and required a paid key to open. Nobody involved appears to have anticipated that this mechanic would eventually support a multi-billion-dollar secondary economy, or that the original case would one day sell for more than most full-price games.
Around forty cases later, here is how the system got from there to here.
2013: The Arms Deal
The Arms Deal update introduced weapon finishes, the case-and-key mechanic and the Community Market in one go. The first case contained fifteen or so finishes and, crucially, a rare special item slot holding knives.
That last detail did most of the work. A cosmetic system with a lottery attached behaves very differently from one without, and the knife slot gave every case opened a small chance of something genuinely valuable.
2014 to 2016: Expansion and the First Discontinuations
Cases arrived steadily. The eSports cases funded prize pools. Operation cases arrived attached to paid campaigns and stopped dropping when those campaigns ended.
This is where the two-tier structure that still defines the market emerged. Cases either remain in the active drop pool, where players receive them weekly, or they move to the rare drop pool, where they no longer drop and supply is permanently fixed.
Discontinued cases began appreciating almost immediately, and the earliest ones have never stopped.
2017 to 2022: Maturity
Case releases settled into a rhythm of a few per year. Gloves arrived in 2016 and joined knives in the rare special slot. Sticker capsules developed into a parallel collectible economy. Prices in the secondary market became sophisticated enough to support dedicated tracking sites, price indices and a genuine trading community.
By the end of this period the pattern was well established: a new case floods supply and trades for cents, then rotates out of the active pool years later and begins a long, slow climb.
2023: Source 2
CS:GO became CS2 in September 2023. Every existing case and skin carried over, re-rendered in a new engine. The transition caused a speculative run in the months beforehand as players bought cases expecting drops to pause, and a correction afterwards when they did not pause for long.
Structurally, nothing about the case system changed. Visually, a great deal did, and some finishes emerged from the transition noticeably more desirable than they went in.
2025: The Trade-Up Crash
The most significant change to the economy arrived in October 2025, when Valve permitted knives and gloves to be crafted through trade-up contracts. The rare special slot had been the anchor of case value for twelve years. Making its output manufacturable removed that anchor, and roughly two billion dollars of paper value disappeared within days.
Case prices themselves held up better than knife prices, but the logic of opening changed permanently. If the expensive outcome can be bought via an alternative route, the value of chasing it through a case falls.
Where Things Stand
Roughly forty cases exist. Around half remain purchasable from the in-game store, with the rest available only on the secondary market. Active-pool cases trade for pennies. Rare-pool cases from 2013 and 2014 trade in the hundreds.
The mechanic itself has proved remarkably durable. Whether you open cases through Steam, trade for the contents directly, or use one of the third-party formats that have grown up around them such as Case Battles, the underlying structure is the one Valve shipped in 2013: a container, a paid key and a weighted random draw. Everything built since is a variation on that.
What has changed is how well understood it is. In 2013 almost nobody was calculating expected value. In 2026 the odds are published, the maths is widely available, and anyone opening a case is doing so with considerably more information than the first generation had. Whether that changes behaviour is a separate question.
