CS2 Case Drop Rates & Odds Explained — Complete Probability Guide (2026)
How likely are you to unbox a knife or glove from a CS2 case? Valve published official weapon-case drop rates in 2017 through Perfect World, after Chinese regulations required loot-box probabilities to be disclosed. Those rates — 79.92% Mil-Spec, 15.98% Restricted, 3.20% Classified, 0.64% Covert, and 0.26% knife or gloves — carried over unchanged into CS2 and match large community samples.
This is TAKE.SKIN's odds reference, built on the same skin and case database as the simulator and ROI calculator. Use it to read the drop table, then price a case at live market values or open it for free with the official rates.
Official CS2 Weapon Case Odds (2017 disclosure)
Standard weapon cases use one drop table: Mil-Spec (Blue) 79.92% (~1 in 1.25), Restricted (Purple) 15.98% (~1 in 6), Classified (Pink) 3.20% (~1 in 31), Covert (Red) 0.64% (~1 in 156), Rare Special / knife or gloves (Gold) 0.26% (~1 in 385). There is no pity timer — each opening is independent. Souvenir packages, sticker capsules, Armory collections, and Genesis Terminals use different tables; the ROI calculator applies the matching odds per container type.
Expected Value & ROI Math
Expected Value (EV) multiplies each possible drop's live market price by its drop probability, then sums the outcomes. If a case plus key costs $2.80 and the EV of its drops is $1.80, average return is about −36%. Very few cases have positive EV. Rank cases by current return on the ROI calculator, then compare individual skins in this database.
StatTrak and Special Patterns
After rarity is rolled, eligible weapon-case items have a 10% chance to be StatTrak™. StatTrak versions of the same skin typically cost 2–5× more. Paint seed still applies on top: Doppler phases, Fade percentage, and Case Hardened blue gems can multiply value far beyond the base rarity rate.
Why Understanding Odds Matters
Opening CS2 cases is entertainment, not investment. On average you lose money. The official table tells you how rare gold is; live prices tell you whether a specific case is a worse or slightly less-bad bet. Set a budget before you open, or run the same odds in the simulator at zero cost.
Case Prices & Expected Return
In October 2026 this page lists 12 CS2 weapon cases. Prices and expected value come from the same TAKE.SKIN case database used by the ROI calculator. Opening is still negative-EV entertainment — use the numbers to compare cases, not to chase a profit.
The cheapest case here is Prisma Case at $0.97; the most expensive is Operation Hydra Case at $24.94. The highest modeled return is Gamma 2 Case (46.6% ROI) , with an average ROI of 44.1% among priced cases. Almost every case costs more to open (case + key) than the expected value of its drops.
Check live EV on the ROI calculator, or open for free at official 2017 rates in the case simulator. Drop-tier probabilities are on CS2 case drop rates.
All CS2 Cases — Compare Before You Open
Gamma 2 Case
Open cost $5.06 · EV $2.36 · Gold avg $385.86 · Top drop: ★ Karambit | Gamma Doppler Emerald
Operation Vanguard Weapon Case
Open cost $6.47 · EV $2.99 · Gold avg $258.76 · Top drop: ★ Karambit | Crimson Web
Prisma Case
Open cost $3.47 · EV $1.59 · Gold avg $234.77 · Top drop: ★ Talon Knife | Doppler Black Pearl
Chroma Case
Open cost $6.62 · EV $3.02 · Gold avg $477.96 · Top drop: ★ M9 Bayonet | Doppler Ruby
Chroma 2 Case
Open cost $5.81 · EV $2.61 · Gold avg $472.48 · Top drop: ★ M9 Bayonet | Doppler Ruby
Gamma Case
Open cost $5.04 · EV $2.26 · Gold avg $385.86 · Top drop: ★ Karambit | Gamma Doppler Emerald
Chroma 3 Case
Open cost $5.43 · EV $2.40 · Gold avg $472.48 · Top drop: ★ M9 Bayonet | Doppler Ruby
Glove Case
Open cost $11.69 · EV $5.09 · Gold avg $747.63 · Top drop: ★ Sport Gloves | Hedge Maze
Operation Wildfire Case
Open cost $5.00 · EV $2.12 · Gold avg $100.97 · Top drop: ★ Bowie Knife | Crimson Web
CS:GO Weapon Case 3
Open cost $14.34 · EV $6.02 · Gold avg $266.02 · Top drop: ★ Karambit
Shattered Web Case
Open cost $5.99 · EV $2.48 · Gold avg $110.12 · Top drop: ★ Skeleton Knife | Crimson Web
Operation Hydra Case
Open cost $27.44 · EV $11.34 · Gold avg $747.63 · Top drop: ★ Sport Gloves | Hedge Maze
Frequently Asked Questions
Q:What is the chance of getting a knife from a CS2 case?
0.26%, or about 1 in 385 cases. Valve disclosed this rate in 2017; it is the same for all standard CS2 weapon cases.
Q:Are CS2 case odds rigged?
No evidence suggests Valve rigs official case odds. Community data from millions of openings matches the 2017 disclosure (0.26% gold). Variance still means one player can hit gold early and another can open 1,000 cases with none.
Q:Which CS2 case has the best odds?
All standard weapon cases share the same rarity-tier drop rates. 'Best' means highest expected value from the skins inside, which changes with market prices. Use the ROI calculator for that ranking.
Q:How many cases do I need to open for a knife?
Statistically, about 385 opens gives a 63.2% chance of at least one gold (1 − (1−0.0026)^385). Randomness means you could hit on the first case or miss in 1,000.
Q:Do case opening sites have different odds than Steam?
Third-party case sites set their own odds, which may differ from Valve's. Check whether a site is provably fair. The TAKE.SKIN simulator uses Valve's official drop rates only — it does not pay out real skins.