Big Brain
Potential Drops
Big Brain Case
Open the Big Brain Case on CaseBattles.gg. Below are the full contents with exact, provably-fair drop rates, current skin values, and the case's expected value, with no hidden odds. You can open it solo or add it to a case battle.
Big Brain Case Odds & Drop Rates
| Item | Wear | Drop chance | Value |
|---|---|---|---|
| USP-S | Cortex | Minimal Wear | 2.50% | 10.13 |
| USP-S | Jawbreaker | Minimal Wear | 2.50% | 9.03 |
| USP-S | Sleeping Potion | Minimal Wear | 2.50% | 5.24 |
| MP5-SD | Acid Wash | Factory New | 2.50% | 3.93 |
| FAMAS | Neural Net | Minimal Wear | 2.50% | 2.44 |
| P2000 | Acid Etched | Minimal Wear | 2.50% | 1.83 |
| MP5-SD | Acid Wash | Field-Tested | 19.00% | 1.41 |
| FAMAS | Neural Net | Battle-Scarred | 19.00% | 1.23 |
| P2000 | Acid Etched | Field-Tested | 19.00% | 0.98 |
| P250 | Constructivist | Factory New | 28.00% | 0.24 |
Is the Big Brain Case Worth Opening?
The Big Brain Case has an expected value of about 1.57 gems against its 1.67 gem open price. That figure is the long-run average. Individual openings are high-variance, which is the whole point. The top prize is USP-S | Cortex (Minimal Wear) at roughly 10.13 gems. Every drop is provably fair, and the rates on this page are the ticket ranges each roll is mapped to.
Open the Big Brain Case in a Battle
Prefer competition? Add the Big Brain Case to a CS2 case battle and open the same case at the same time as other players: the highest total value takes the entire pot. You can go 1v1, 2v2, 3v3, or free-for-all.
Related cases
Other CaseBattles cases at a similar price to the Big Brain Case.
- Zero to Hero1.68 gems
- Banana Bowman1.42 gems
- Friday Night2.10 gems
- Crusader2.11 gems
- Poison Frog2.24 gems
- Rabbit Hole2.25 gems
Big Brain Case FAQ
What is the best item in the Big Brain Case?
The top prize is USP-S | Cortex (Minimal Wear), worth about 10.13 gems, with a 2.50% drop chance.
What are the drop rates for the Big Brain Case?
Every item's exact drop rate is published in the table above. The combined chance of unboxing a knife or glove is 0.00%.
Is the Big Brain Case worth opening?
Its expected value is about 1.57 gems against a 1.67 gem open price. Like every case it is high-variance, and the published odds let you decide for yourself.
Can I open the Big Brain Case in a case battle?
Yes. Add the Big Brain Case to a case battle and open it head-to-head against other players: the highest total value wins the whole pot.
Related: Best CS2 cases to open · CS2 case opening · Provably fair · CS2 upgrader · Free CS2 cases