# Mystery Box Game, Win Cash | Grand Draws

> Pick a box in our free Mystery Box game demo and lift the lid. Instant wins are coming to future competitions. UK. 18+.

Source: https://granddraws.co.uk/games/mystery-boxes

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# Mystery Box Game, Pick a Box to Win Cash

**The Mystery Box game lets you pick one sealed box to reveal your prize.** In our free demo you choose a box and lift the lid, nothing inside is real. Instant wins are planned for future competitions: when they arrive, mystery boxes will reveal real tax-free cash on qualifying entries, with every outcome decided on our server before you pick. UK, 18+.

## How to play Mystery Boxes

Mystery Boxes is a one-pick game. Here’s how choosing a box works in the demo below.

1. 1 Face the boxes Each ticket shows three sealed boxes. The demo deals three tickets so you can play a few rounds.
2. 2 Pick a box Choose one box to open. Which box you pick can’t change what you win, the outcome was set before you chose.
3. 3 Lift the lid Your box opens to reveal cash, credit or a miss. Every result is decided on our server the moment the round starts.

## Mystery Boxes questions

### Can I win cash on the Mystery Box game now?

Not yet. It’s a free demo with no real prizes. Instant wins are planned for future competitions, where mystery boxes will reveal real tax-free cash on qualifying entries.

### Does picking a different box change what I win?

No. The result is set on our server before you choose, so every box holds the same outcome for that round. Which one you lift only changes the reveal, not the prize.

### Is the Mystery Box game fair?

Yes. Outcomes are decided server-side before you pick and can’t be altered from your browser.

### Is the Mystery Box game gambling?

No. It reveals instant prizes on skill-based competitions with a free postal entry route, so it sits outside UK gambling law. 18+.

## More instant-win games

## MYSTERY BOXES

Three sealed boxes per ticket. Pick one and lift the lid, whatever is inside was decided on our server before you chose, so the box you pick can never change the outcome.

## Fair by design: how it actually works

The outcome is decided on our **server** the moment you play, not in your browser, the game just reveals it, so it can't be tampered with from devtools. When live, each entry is tied to a real ticket, uses cryptographic randomness, and **draws down the real prize pool atomically** so a prize can never be won more times than it exists. This is a playable demo; it runs server-side on our live site with a local fallback so it still works offline.