Duel Originals — Complete Guide
Duel's proprietary game library: six provably fair games with ~1% house edge and full cryptographic verifiability. Here's everything you need to know about each game.
Quick Answer
What are Duel Originals and why do they matter?
Duel Originals are provably fair proprietary games with ~1% house edge — among the lowest in crypto gaming. Unlike third-party slots, their fairness is mathematically verifiable. With DUEL5 rakeback, effective edge drops to ~0.95%. They include Crash, Blackjack, Roulette, Plinko, Mines, and Dice.
Key Takeaways
- ✓All Duel Originals are provably fair — outcomes can be independently verified cryptographically.
- ✓~1% house edge across all originals — significantly lower than slots (3–5%).
- ✓Effective edge with DUEL5: ~0.95% on most originals, ~0.475% on Blackjack with basic strategy.
- ✓Each original has unique mechanics — from Crash's timing game to Dice's probability selection.
- ✓Provably fair verification uses server seeds + client seeds + nonces — independently auditable.
- ✓Originals offer the best EV on Duel; slots offer more absolute rakeback per dollar wagered.
All Duel Original Games
Crash
A multiplier game where a rising line crashes at a random point. Cash out before the crash to win. The longer you hold, the higher the potential reward — and risk.
Blackjack
Classic blackjack with provably fair dealing. Beat the dealer without busting over 21. Lowest house edge of all Duel Originals when played with basic strategy.
Roulette
European-style roulette with a single zero, delivering 1% house edge — dramatically lower than American roulette (5.26%) or even standard European roulette (2.7%).
Plinko
A ball drops through a peg field and lands in multiplier buckets. Risk level adjusts the distribution of outcomes — higher risk = rarer high multipliers, lower risk = more frequent modest wins.
Mines
Reveal squares on a grid to accumulate multipliers. Hidden mines end the game. Configure mine count and cash out at any point to lock in your multiplier.
Dice
Set a win probability threshold and bet on whether the roll lands above or below it. The payout multiplier is automatically calculated based on your chosen probability and the 1% house edge.
Originals Comparison Table
| Game | Base RTP | House Edge | Eff. Edge (DUEL5) | Volatility | Provably Fair |
|---|---|---|---|---|---|
| Crash | 99% | 1% | 0.95% | high | ✓ |
| BlackjackBest EV | 99.5% | 0.5% | 0.475% | low | ✓ |
| Roulette | 99% | 1% | 0.95% | medium | ✓ |
| Plinko | 99% | 1% | 0.95% | medium | ✓ |
| Mines | 99% | 1% | 0.95% | very-high | ✓ |
| Dice | 99% | 1% | 0.95% | variable | ✓ |
Effective edge assumes DUEL5 rakeback tier (5% of house edge returned).
How Provably Fair Works
Provably fair is a cryptographic system that prevents the casino from manipulating game outcomes. Here's how to verify a Duel Original result:
- Before your bet
Duel generates a server seed and provides you with its cryptographic hash (SHA-256). You can also see your client seed and current nonce.
- During the game
The outcome is determined by combining the server seed, client seed, and nonce through a deterministic algorithm — both parties' inputs prevent manipulation.
- After the game
Duel reveals the actual server seed. You can hash it yourself to confirm it matches what was shown before your bet — proving it wasn't changed.
- Verification
Use Duel's built-in verification tool or any SHA-256 hash tool online. If the hash matches the pre-game hash, the result was fair.