How Case Opening Works (18+)
Cases and keys
A case is a sealed container that requires a key to open. You buy the key, open the case, and receive one random item from that case's pool. The possible items are known in advance, but which one you get is random each time.
The odds
Each rarity tier has a published drop chance, and the most valuable items, including knives and gloves, sit at the lowest probabilities. The rare special items appear only a small fraction of the time, which is exactly why they are expensive on the market. Over many openings the common, low-value results dominate.
This is gambling
Case opening is gambling. The outcome is random, the result is usually worth less than the key you paid, and on average the expected value is negative. It should be treated as paid entertainment, not a way to make money or invest. If you choose to open cases, play responsibly: set a strict limit, never chase losses, and stop when it stops being fun.
This content is intended for adults (18+). If gambling is affecting you or someone you know, help is available at begambleaware.org.
Buying is usually cheaper
If you want a particular skin, buying it directly on a marketplace is almost always cheaper than trying to open it from a case. The market price already reflects how rarely it drops, so spending that amount once gets you the exact item, with no randomness. See our marketplace comparison to buy the skin you actually want.
Third-party case sites
Separate third-party case-opening websites operate outside Steam and carry their own, often worse, odds and risks. We list some on our case sites page for reference only. Treat all of them as gambling, check that any site is legal where you live, and never deposit more than you can afford to lose.
Frequently Asked Questions
Is opening cases a good way to get skins?
Usually not. On average it costs more than the skins you receive. Buying the specific skin you want is normally cheaper and carries no randomness.
Is case opening gambling?
Yes. The outcome is random with a negative average expected value, so it should be treated as paid entertainment for adults, not an investment.
What are the odds of getting a knife?
Very low. The rarest items such as knives and gloves have the smallest drop chances, which is why they are so valuable on the market.
How much does it cost to open a case?
You pay for the key each time, and often for the case itself. Those costs add up quickly across many openings.
Where can I get help with gambling?
If gambling is causing harm, support is available at begambleaware.org. Set limits, never chase losses, and stop if it stops being fun.