Question 1

What is GrandCase?

Accepted Answer

GrandCase is a CS2 case opening platform with cases, contracts and upgrades. Drops can be kept in your site inventory, sold back to balance or withdrawn to your Steam account when the item is tradable.

Question 2

How do I start playing?

Accepted Answer

Sign in through Steam, choose a currency, top up your balance or use items from your inventory, then pick a case, contract or upgrade. We recommend checking the item list and odds before every roll.

Question 3

What is balance used for?

Accepted Answer

Balance is used to open cases, pay contract cost when required and enter upgrades with a selected amount. If you sell a drop, the converted value is added back to your balance.

Question 4

Can I change currency?

Accepted Answer

Currency is selected during your first sign-in. If you need to change it later, contact support and we will handle the request manually. Item values and game prices are based on current Steam market rates.

Question 5

How do cases work?

Accepted Answer

Every case has a visible item list with predefined chances. When you open a case, one of those items drops according to its chance, and the result can be checked afterwards.

Question 6

How does Upgrade work?

Accepted Answer

Choose an input item or a balance amount, then select the target item you want to win. The chance depends on the relation between your input value and the target value, and the completed roll decides whether the upgrade succeeds.

Question 7

How do Contracts work?

Accepted Answer

A contract uses 10 selected inventory items. Their total value defines the reward range, and the completed roll chooses one item from the available contract rewards.

Question 8

Why do chances differ between items?

Accepted Answer

Chances depend on where the drop comes from: case odds, upgrade value ratio or the contract reward pool. Percentages may be rounded on cards, while the check page shows the exact details used for that result.

Question 9

What does Provably Fair mean here?

Accepted Answer

Each completed game receives a roll code. On the Provably Fair page you can enter it and see which game it came from, what items were available, what the chances were and which item won.

Question 10

Where do I find my roll code?

Accepted Answer

Open your profile history, find the case, contract or upgrade, and press the shield/check button. It opens the verification page with the roll code already filled in.

Question 11

How do I know the result was not changed later?

Accepted Answer

Before a game, one part of the check data is visible to you and the other part is revealed later. After reveal, you can open the check page and make sure the completed roll was not changed afterwards.

Question 12

Why can displayed percentages be rounded?

Accepted Answer

The UI shows compact percentages for readability. For exact values, open the Provably Fair check page; it shows the details used for that specific result.

Question 13

How do withdrawals work?

Accepted Answer

Select tradable items in your inventory and confirm withdrawal. The item is sent to the Steam trade URL saved in your profile, so the URL must be valid and your Steam account must be able to receive trades.

Question 14

Can I sell a drop instead of withdrawing it?

Accepted Answer

Yes. Eligible items can be sold from your inventory. After a successful sale, the item is removed from inventory and the sale value is added to your balance.

Question 15

Why do I need a Steam Trade URL?

Accepted Answer

The trade URL tells us where to send withdrawn skins. If it is missing, expired or belongs to another account, Steam trades can fail or be blocked.

Question 16

What should I do if withdrawal failed?

Accepted Answer

Check your trade URL, Steam inventory privacy, trade hold status and Steam Guard restrictions. If everything is correct but the item is stuck, contact support with the item name and transaction time.

Question 17

Why do I sign in through Steam?

Accepted Answer

Steam sign-in confirms your identity without sharing your Steam password with us. We only receive the public account data needed to link profile, inventory and withdrawals.

Question 18

Should I enable 2FA?

Accepted Answer

Yes. Two-factor authentication adds a confirmation step when signing in and protects your GrandCase account if your email or device becomes compromised.

Question 19

Where can I see transactions and history?

Accepted Answer

Open your profile to see inventory, cases, contracts, upgrades and transaction history. Completed rolls can also be verified from there.

Question 20

When should I contact support?

Accepted Answer

Contact support if a deposit, sale, withdrawal or roll result is missing after refresh. Include your Steam profile, approximate time and roll code or transaction details when available.

FAQ

Basics

Game modes

Provably fair

Inventory

Security

Battle pass

Operator

FAQ