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- The simulator uses virtual credits only. No deposits, no cash-out, no real skins.
- Rare special items (knives and gloves) drop about 0.26% of the time, or roughly 1 in 385 openings.
- Expected value per case is almost always below its price. Simulating hundreds of openings shows this clearly.
- Use it to learn variance before you ever touch a real site. Canadians should treat any real-money play as entertainment.
How to use the CS2 case opening simulator
Pick a case, choose how many cases to open in one go, and press open. The simulator rolls each opening using the standard rarity weights, shows what dropped, and keeps a running tally of credits spent versus the value of the items you pulled. You can reset the balance at any time, and nothing is stored beyond your browser session.
We recommend three experiments. First, open one case at a time for 20 openings and notice how streaky it feels. Second, open 100 in a batch and compare the result to the theoretical average. Third, repeat the 100-case batch five times and look at how wildly the outcomes differ. That spread is variance, and it is the reason real-money case opening feels exciting and dangerous at the same time.
Drop odds used by the simulator
CS2 cases use fixed rarity tiers. Within each tier our simulator assigns equal weight to each skin, which mirrors how the game treats most collections.
| Rarity | Colour | Chance per opening | Roughly 1 in |
|---|---|---|---|
| Mil-Spec | Blue | 79.92% | 1.25 |
| Restricted | Purple | 15.98% | 6.3 |
| Classified | Pink | 3.20% | 31 |
| Covert | Red | 0.64% | 156 |
| Rare Special (knife/gloves) | Gold | 0.26% | 385 |
For a deeper look at how these tiers work, wear values and StatTrak modifiers, read our guide to case opening odds.
The math behind expected value
Expected value (EV) is the average return per opening if you could repeat it forever. It equals the sum of each outcome's probability multiplied by its value, minus the cost to open.
EV = (Pblue × Vblue) + (Ppurple × Vpurple) + … + (Pgold × Vgold) − cost
A worked example in CA$
Suppose a case plus key costs about CA$4.50. Assume average market values of CA$0.10 for blue, CA$0.60 for purple, CA$3.00 for pink, CA$20 for red and CA$550 for gold. Then:
- Blue: 0.7992 × 0.10 = CA$0.080
- Purple: 0.1598 × 0.60 = CA$0.096
- Pink: 0.032 × 3.00 = CA$0.096
- Red: 0.0064 × 20 = CA$0.128
- Gold: 0.0026 × 550 = CA$1.430
The sum is about CA$1.83 against a cost of CA$4.50, which is an expected loss near CA$2.67 per case, or about 59%. Notice that more than three quarters of the value comes from the 0.26% gold tier. Without a knife, you will almost certainly lose money on any given batch. These numbers are illustrative only; item prices move daily, so check current Steam Community Market values.
Why variance matters more than averages
The probability of at least one gold item in n openings is 1 − (1 − 0.0026)n. After 100 cases that is about 23%. After 385 cases it is roughly 63%, not 100%. After 1,000 cases it is about 93%. That means a meaningful fraction of players will open hundreds of cases and never see a knife, while a few will hit one in their first ten. Both are normal outcomes.
| Cases opened | Chance of at least one gold |
|---|---|
| 10 | 2.6% |
| 100 | 22.9% |
| 385 | 63.2% |
| 1,000 | 92.6% |
Tips for getting the most from the simulator
- Test your reaction to losing streaks. If 50 straight blues makes you want to chase, that is useful self-knowledge.
- Compare cases. Cheaper cases with a lower-value gold pool often have a higher return percentage than premium ones. See our CS2 cases overview.
How the simulator relates to real sites
On gambling sites such as CSGOEmpire and CSGORoll, cases are priced in site coins and often carry their own custom odds and item pools. Many sites also publish a provably fair seed system so you can verify each opening after the fact; see provably fair explained. Provably fair proves the roll was not tampered with, but it does not change the house edge. If you want to try a real site, a free case is the lowest-risk way: CSGOEmpire offers a Free Case worth up to 2,050 coins with code case2go, and you can read the details on the CSGOEmpire promo code page.
Responsible gambling reminder
Opening cases for real money is gambling. Only play with money you can afford to lose, set limits, and take breaks. If gambling is causing harm, call ConnexOntario at 1-866-531-2600 or visit our responsible gambling page for provincial helplines and self-exclusion options.
Frequently asked questions
Does the simulator use real money?
No. It runs on virtual credits only, so nothing you win or lose has any cash value and no deposit is ever required.
Are the drop odds the same as in the real game?
We use the widely documented rarity tiers: roughly 79.92% Mil-Spec, 15.98% Restricted, 3.2% Classified, 0.64% Covert and 0.26% rare special items. Individual skins inside each tier are weighted equally.
Is opening cases profitable in the long run?
Almost never. The expected value of a case is usually well below the key and case price, so the average opener loses money over time.
Can I predict when a knife will drop?
No. Each opening is independent, so a long dry streak does not make a knife more likely on the next case.
Is case opening on gambling sites different from Valve cases?
Site cases are priced in site coins and have their own published odds, but the same principle applies: the average return is below the price paid.
Play responsibly: CS2 gambling is for adults 19+ (18+ in AB, MB, QC). Set limits, never chase losses, and use self-exclusion if it stops being fun. Free, confidential help: ConnexOntario 1-866-531-2600 or your provincial helpline — see our responsible gambling page.