BC.Game Limbo Verifier
Verify the fairness of your BC.Game Limbo multiplier outcomes using cryptographic proof
Understanding BC.Game Limbo
Game Statistics
How It Works
clientSeed:nonce, keyed with your server seed
floor(98 / (1 - float)) / 100 at the 2% house edge, never below 1.00x
100% Private
All verification happens entirely in your browser. Your seeds and bet data never leave your device - we don't collect, store, or transmit any information.
How to Verify BC.Game Limbo Results
Step 1: Get your seed data from BC.Game
To verify a Limbo bet, you need three pieces of data:
- Server Seed (Unhashed): Navigate to your BC.Game Fairness settings. Click "Unhash" or "Reveal" next to your active server seed to view the unhashed version.
- Client Seed: Found in the same Fairness settings. You can use BC.Game's default seed or set your own custom seed.
- Nonce: Each bet has a unique nonce number. Find it in your bet history by clicking on the specific Limbo bet you want to verify.
Note: You can only verify bets made before you unhash the server seed. Once revealed, change your server seed for future bets.
Step 2: Enter your data in the form above
Paste your bet data into the verification form:
- Enter your Client Seed exactly as shown in BC.Game's Fairness settings
- Enter the Server Seed (Unhashed) - this is the revealed seed, not the SHA256 hash
- Enter the Nonce number for the specific Limbo bet you want to verify
- Keep the House Edge at 2 unless your bet was settled at another edge
The verifier calculates the multiplier with BC.Game's HMAC-SHA256 algorithm and the house edge you enter.
Step 3: Compare the result with your bet
After clicking Verify, you'll see the calculated Limbo multiplier:
- The result will be a multiplier of at least 1.00x
- Compare this calculated multiplier with the result shown in your BC.Game bet history
- If they match exactly, the bet was provably fair and not manipulated
If results don't match, verify you're using the unhashed server seed (not the hash) and the correct nonce for that specific bet.
Frequently Asked Questions
What is BC.Game Limbo and how does it work?
BC.Game Limbo is an instant multiplier game with a 2% house edge (98% RTP). You set a target multiplier from 1.01x to 1,000,000x, and if the result meets or exceeds your target, you win. The result is at least 1.00x, and BC.Game's official Limbo verification script sets no upper limit on it. The chance of reaching a target is about 98% divided by the target, so 2x hits about 49% of the time and 100x about 0.98%.
How is the BC.Game Limbo multiplier calculated?
BC.Game Limbo computes HMAC-SHA256 of clientSeed:nonce with your server seed as the key. The first 13 hex characters (52 bits) divided by 2^52 give a float between 0 and 1, rounded to 9 significant digits. The multiplier is floor((100 - house edge) / (1 - float)) / 100, never below 1.00x, which is floor(98 / (1 - float)) / 100 at the 2% edge. BC.Game's published limbo.html skips the 9-digit rounding, but the results BC.Game records match with it; the two differ on only a few high multipliers.
Why doesn't my verification result match?
Common reasons for mismatched results:
- Using hashed server seed: You need the unhashed (revealed) server seed from BC.Game's Fairness settings, not the SHA256 hash.
- Wrong nonce: Each Limbo bet has a unique nonce - verify you're using the exact nonce for that specific bet.
- Seed pair mismatch: The server and client seeds must be the exact pair that was active when the bet was placed.
Is my bet data safe when using this verifier?
Absolutely. All verification happens 100% client-side in your browser using JavaScript. Your seeds, nonces, and bet data never leave your device - we don't collect, store, or transmit any information to our servers. The entire verification process runs locally on your computer.
Can I verify BC.Game Crash with this tool?
No, this tool is specifically designed for BC.Game Limbo. While Limbo and Crash both generate multipliers, they use different algorithms. For Crash verification, use our dedicated BC.Game Crash Verifier which implements the correct crash multiplier calculation method.