CS2 Cases with Butterfly Knives

Butterfly knives were first introduced with the Operation Breakout Weapon Case and have since appeared in several subsequent cases. Each case that includes butterfly knives features them as part of the rare special items pool, which also includes other knife types and sometimes gloves.

Only cases that specifically list butterfly knives in their rare special item pool can drop them. Opening a case that does not include butterfly knives in its pool means you have zero chance of receiving one, no matter how many you open. Always check the case contents before spending money on keys or cases.

The butterfly knife pool spans multiple finishes and patterns. Each case that contains butterfly knives will have the same set of butterfly knife skins available — the difference between cases is the other knives and gloves that share that rare special item pool.

The following cases are known to include butterfly knives in their rare special item pool. Note that Valve can update case contents, so always verify current case pools on our CS2 cases database.

• Operation Breakout Weapon Case: The original case that introduced butterfly knives to the game. This case is no longer in the active drop pool, making it more expensive to acquire.
• Spectrum Case: Features butterfly knives alongside several other knife types including the Huntsman and Falchion knives.
• Spectrum 2 Case: A follow-up with an updated collection of skins and the same butterfly knife availability.
• Operation Riptide Case: A more recent case that includes butterfly knives in the rare special item pool.

Newer cases released by Valve may also include butterfly knives. Check each case's rare special items listing for the most current information. Our cases page tracks all active case contents.

The widely cited odds of receiving any knife or gloves from a CS2 case are approximately 0.26%, or roughly 1 in 385 case openings. This is the base chance for hitting the rare special item tier when opening any case.

However, landing in the rare special item tier does not guarantee a butterfly knife. That tier contains multiple knife types (and sometimes gloves), so the butterfly knife is just one of several possible outcomes. The more knife types a case includes in its rare pool, the lower your conditional probability of receiving specifically a butterfly knife.

When you factor in both the base rare item chance and the selection within that tier, the probability of unboxing a specific butterfly knife skin in a specific wear condition becomes extraordinarily small. This is why butterfly knives command significant market value — their scarcity is built into the system. Use our case odds calculator to explore the math in detail.

Butterfly knife prices vary enormously depending on the skin finish, wear condition, and whether the knife is StatTrak. Factory New butterfly knives with popular finishes sit at the top of the market, while Battle-Scarred versions of less popular skins are more accessible.

Among the most valued butterfly knife finishes are the Fade, Doppler, Marble Fade, and Crimson Web. Vanilla (no skin) butterfly knives tend to be the entry point for collectors looking to own one without paying top-tier prices. You can track current pricing trends on our knife skins page.

Prices fluctuate based on market conditions, new case releases, and major tournament events. Rather than citing specific dollar amounts that will quickly become outdated, we recommend checking the Steam Community Market or third-party price trackers for current valuations.

Since the base knife drop rate is consistent across all cases, the best case for targeting a butterfly knife comes down to two factors: how many competing knife types share the rare pool, and how much the case itself costs to acquire.

Cases with fewer knife types in their rare pool give you a slightly higher conditional chance of your knife being a butterfly specifically. However, cases with larger knife pools also offer more chances at other valuable knives, which can offset the lower butterfly-specific odds from a pure value standpoint.

From a cost perspective, older cases like the Operation Breakout Weapon Case can be significantly more expensive to purchase than newer cases. If you are purely optimizing for the chance of a butterfly knife per dollar spent, compare both the case price and the size of each case's knife pool before deciding. Our best cases to open guide provides a broader value analysis across all cases.

Explore more questions about skins and cases in our Skins & Cases FAQ hub.