CS2 Gamma Case: Knives, Skins, Odds & Is It Worth Opening? (2026)

The Gamma Case is a CS2 weapon case released on June 10, 2016, best known for introducing the Gamma Doppler knife finish — including the Karambit | Gamma Doppler Emerald, one of the priciest pulls in the game. This guide breaks down every skin and knife inside, the real drop odds, current 2026 prices, and whether opening it is actually worth your money. 

What Is the Gamma Case in CS2?

The Gamma Case arrived with the "Gamma Exposure" update on June 10, 2016, and it's no longer part of the weekly drop pool, so you'll need to pick one up on the market rather than earn it from playing. It currently runs around $3 on Skin.Land, with a Gamma Case Key costing roughly $2.50 on top. 

For a primer on keys, Prime Status, and how case opening works in general, see our guide to getting CS2 cases. 

The case holds 17 standard weapon skins — 2 Covert, 3 Classified, 5 Restricted, and 7 Mil-Spec — plus the knife pool as the rare special item. Unlike the knife-rarity confusion some players run into, the knife finishes themselves still carry Covert rarity in listings, even though they're drawn from a separate rare-special-item slot rather than the regular Covert weapon pool. 

What Knives Are in the Gamma Case?

The Gamma Case contains 5 knife models, each available in 6 main finishes — Bayonet, Flip Knife, Gut Knife, Karambit, and M9 Bayonet, each rolling Gamma Doppler, Lore, Autotronic, Black Laminate, Freehand, or Bright Water. Counting the four Gamma Doppler phases and the Emerald gem separately, there are 10 possible finish variants per model. For a full breakdown of how Gamma Doppler's phases and the Emerald gem work, see our guide to Gamma Doppler phases, and for how these models compare overall, our CS2 knife tier list. 

The headline pull is the ★ Karambit | Gamma Doppler Emerald, which runs upward of $6,840 Factory New — one of the priciest single items you can pull from any case in the game. The M9 Bayonet's Emerald variant is right behind it in theory, though Factory New copies are so thin on the market that a Minimal Wear listing at around $5,630 is the only one currently available, worth double-checking before relying on that figure. 

Prices from Skin.Land's live catalog at the time of writing — knife prices shift daily, check the current listing on Skin.Land before buying. 

Gut Knife is the most accessible entry point into this knife pool — a Black Laminate copy runs around $45, a fraction of what the same finish costs on a Karambit or M9 Bayonet. 

What Skins Are in the Gamma Case?

Here's the full skin lineup with current 2026 prices, all in Factory New. 

Prices move daily — check the live catalog on Skin.Land before buying. 

The Covert Skins — M4A1-S | Mecha Industries & Glock-18 | Wasteland Rebel

The M4A1-S | Mecha Industries is a mechanical, robotic-panel design running around $190 Factory New, comfortably the priciest standard weapon skin from this case. The Glock-18 | Wasteland Rebel pairs a desert-camo base with painted graffiti-style artwork, sitting at roughly $100 Factory New and remaining one of the more recognizable Glock finishes from this era. 

Gamma Case Odds & Drop Rates

The Gamma Case uses the same fixed drop rates as every other CS2 weapon case. Here's the breakdown: 

In plain terms: Mil-Spec and Restricted skins combined account for 95.9% of all openings, so the large majority of pulls land on a low-value weapon skin. Each opening has approximately a 0.64% chance of producing a Covert skin (about 1 in 156), while the chance of receiving a knife is approximately 0.26% (about 1 in 385). Every opening is independent, and neither outcome is guaranteed after any specific number of attempts. Which of the 5 models and 10 finish variants a knife pull actually lands on is then rolled separately, so pulling a specific combination like the Karambit | Gamma Doppler Emerald is an extremely long shot. For the full math behind these numbers, see our CS2 case odds and chances guide. 

Is the Gamma Case Worth Opening?

Short answer: no, not as an investment. Opening one costs around $5.50 (roughly $3 for the case plus $2.50 for the key). Approximately 95.9% of openings result in a Mil-Spec or Restricted skin, most of which have relatively low resale values compared with the cost of opening the case, so the odds haven't improved just because this case holds one of the most expensive knife pulls in the game. 

Case opening is generally a poor financial strategy because most outcomes are worth less than the opening cost. The Gamma Case's exact expected value depends on current item prices, drop probabilities, and marketplace fees — and the eye-catching Karambit | Gamma Doppler Emerald headline is buried inside an already-rare 0.26% knife chance split across 5 models and 10 finish variants, with no published breakdown of how that chance divides between them. If you specifically want one of the knives or skins from this case, buying it directly on the market is almost always cheaper and guaranteed. For a broader take on which cases give the least-bad value, see our guide to which CS2 case is best to open. 

If you just want to try your luck without spending much, cheapest CS2 cases is your shortlist. For skins that hold value over time instead of a random roll, our CS2 skins to invest in guide has picks worth a look. 

FAQ

When was the Gamma Case released?

The Gamma Case was released on June 10, 2016, as part of the "Gamma Exposure" update. It introduced the Gamma Doppler knife finish, including the Emerald gem variant, to CS2 for the first time.

What knives are in the Gamma Case?

The Gamma Case drops 5 knife models — Bayonet, Flip Knife, Gut Knife, Karambit, and M9 Bayonet — each available in 6 main finishes: Gamma Doppler, Lore, Autotronic, Black Laminate, Freehand, and Bright Water. Counting the four Gamma Doppler phases and the Emerald gem separately, that's 10 possible finish variants per model.

What are the odds of getting a knife from the Gamma Case?

The odds of unboxing a knife from the Gamma Case are approximately 0.26% per opening, the same rare-special-item rate shared by every CS2 case. Which of the 5 models and 10 finish variants you actually get, plus its wear and StatTrak status, are then rolled separately, and Valve doesn't publish how that chance divides between them.

How much does it cost to open a Gamma Case?

Opening one Gamma Case costs around $5.50 total — about $3 for the case on the market plus roughly $2.50 for a Gamma Case Key.

Is the Gamma Case worth buying or opening?

If your goal is a specific knife or skin, buying it directly from a marketplace like Skin.Land is cheaper and guaranteed. Case opening is generally a poor financial strategy since most outcomes are worth less than the cost of opening, and the headline Karambit | Gamma Doppler Emerald pull is buried inside an already-rare 0.26% knife chance — treat it as entertainment, not an investment.

What is the most valuable item in the Gamma Case?

The Karambit | Gamma Doppler Emerald is the case's priciest pull by far, running upward of $6,840 Factory New. Among the standard weapon skins, the M4A1-S | Mecha Industries leads at around $190 Factory New.