Gamma Case Knives, Skins & Odds
Everything inside the Gamma Case: all 17 weapon skins, every knife in its rare pool, the odds, and how the case fits into the CS2 knife trade up.
The Gamma Case was released in 2016 and contains 17 weapon skins plus a rare pool of 30 knives (Doppler-type finishes counted once, with their phases listed).
Below: every skin by rarity, every knife in the rare pool, the odds, and what the case means for trade ups.
Try it for free: open the Gamma Case in the Gamma Case simulator with real odds, or check live prices for every knife in this case on CS2TradeUp.gg.
All Gamma Case skins
These are the weapon skins that can drop from the Gamma Case, from rarest to most common. Each can also drop as StatTrak.
Covert (2)
Classified (3)
Restricted (5)
Mil-Spec (7)
The Covert skins in this case are the inputs for its knife trade up: Glock-18 | Wasteland Rebel, M4A1-S | Mecha Industries.
What knives are in the Gamma Case?
The Gamma Case's rare special pool contains these 5 knives in Gamma finishes:
Each knife comes in the Gamma finishes: Gamma Doppler, Lore, Autotronic, Black Laminate, Bright Water and Freehand.
Bayonet (6)
Flip Knife (6)
Gut Knife (6)
Karambit (6)
M9 Bayonet (6)
The same rare pool (same items, same finish set) also drops from Gamma 2 Case. Covert skins from those cases lead to the same pool in a trade up.
The same knives in a different finish set come from Chroma Case, Chroma 3 Case, Chroma 2 Case, Revolver Case.
Gamma Case odds
Valve has disclosed the same rarity odds for every standard weapon case. The Gamma Case follows them:
| Rarity | Chance per case | About 1 in |
|---|---|---|
| Mil-Spec | 79.92% | 1.25 |
| Restricted | 15.98% | 6 |
| Classified | 3.20% | 31 |
| Covert | 0.64% | 156 |
| Knife / gloves | 0.26% | 385 |
A knife is therefore roughly a 1-in-385 drop, and each case also needs a key. On average that makes unboxing one of the most expensive ways to get a knife. See CS2 case odds explained.
Gamma Case and knife trade ups
Since the October 2025 update, five Covert skins can be traded up into a knife or pair of gloves. The result is drawn from the rare pool of the case your Covert inputs come from. So five Covert skins from the Gamma Case can only give knives from the list above.
That makes the pool's average value the number that matters: a trade up aimed at the best knife in this case can just as easily land on the cheapest one. Mixing Covert skins from different cases splits your odds between their pools.
Price it before you sign. The knife trade up calculator lists every possible result from this case's pool with odds, predicted float and expected value at live prices.
More: how the knife trade up works and how the output float is calculated.
Is the Gamma Case worth opening?
Opening any case is a paid random draw: most openings return a Mil-Spec worth far less than the case plus key. If you want a specific knife from this pool, buying it outright is almost always cheaper. If you want any knife from the pool, compare the price of five Covert skins from this case against the pool's average value in the calculator.
Browse every case: all CS2 cases and their knives.
Frequently asked questions
What knives are in the Gamma Case?
The Gamma Case contains Bayonet, Flip Knife, Gut Knife, Karambit and M9 Bayonet in Gamma finishes.
What are the Gamma Case odds?
Knives or gloves drop about 0.26% of the time (roughly 1 in 385), Covert 0.64%, Classified 3.2%, Restricted 16% and Mil-Spec 80%.
Can I trade up Gamma Case Covert skins into a knife?
Yes. Five Covert skins from the Gamma Case give one item from its rare pool: the knives listed above. Mixing cases splits the odds between pools.