In casino software, RNG is a certified algorithm that generates unpredictable results for each game event. It is essential for game fairness, regulatory approval, and player trust across all RNG-based games such as slots, table games, and instant games.
Why It Matters
RNG is not just a technical component—it is a regulatory and reputational cornerstone of iGaming operations. Regulators, payment providers, and players all rely on RNG integrity to ensure:
- Fair and unbiased game outcomes
- Transparent payout structures (RTP)
- Protection against manipulation or tampering
- Compliance with licensing requirements
Without certified RNG systems, an online casino cannot operate legally or maintain credibility.
Breakdown
1. What Is RNG in Casino Software?
An RNG is a mathematical algorithm that continuously generates sequences of numbers with no predictable pattern. In casino software, these numbers are used to determine game outcomes such as:
- Slot reel positions
- Card distribution in digital table games
- Outcomes in instant and crash games
Modern casino platforms use pseudo-random number generators (PRNGs) combined with cryptographic techniques to ensure unpredictability.
2. How RNG Works in Practice
RNG systems run continuously, even when no one is playing.
Typical process:
- The RNG generates random numbers at high frequency.
- When a player initiates an action (e.g., spins a slot), the system captures the current RNG output.
- The game logic translates that number into a specific outcome.
- The result is displayed to the player instantly.
Key principle:
Each outcome is independent of previous or future results. Past spins or hands do not influence future outcomes.
3. RNG vs Live Casino Outcomes
| Aspect | RNG Games | Live Casino Games |
| Outcome Source | Algorithmic | Physical equipment + dealers |
| Human Involvement | None | Yes |
| Certification | RNG testing labs | Game and equipment certification |
| Transparency | Statistical | Visual / real-time |
| Scalability | Very high | Limited by tables |
RNG applies strictly to software-driven games, not live dealer products.
4. Fairness and RTP (Return to Player)
RNG systems work in conjunction with predefined RTP values.
How RTP works:
- RTP represents the theoretical percentage of wagers returned to players over time.
- RNG ensures outcomes follow probability distributions aligned with the RTP model.
- Short-term variance is expected, but long-term results converge toward the RTP.
Industry benchmark:
RTP values for online slots typically range from 94% to 98%, depending on market and game design.
5. RNG Certification and Compliance
RNG systems must be independently tested and certified by approved laboratories.
Common certification bodies include:
- GLI (Gaming Laboratories International)
- iTech Labs
- BMM Testlabs
- eCOGRA
Certification typically covers:
- Algorithm integrity
- Outcome randomness
- Resistance to manipulation
- Alignment with declared RTP
Regulatory requirement:
Most licensing authorities require valid RNG certification before approving game content.
6. Ongoing Monitoring and Audits
RNG compliance does not end after certification.
Ongoing requirements include:
- Periodic re-testing
- Version control and change management
- Secure deployment and access controls
- Log retention for audits and dispute resolution
Any unauthorized change to RNG logic can invalidate certification.
7. Common Misconceptions About RNG
“RNGs can be adjusted to make players lose.”
Certified RNGs cannot be dynamically altered without invalidating compliance and risking license suspension.
“Games are ‘due’ after losses.”
False. RNG outcomes are independent events.
“High RTP guarantees short-term wins.”
False. RTP applies over a large number of game rounds.
Certified vs Non-Certified RNG
| Area | Certified RNG | Non-Certified RNG |
| Fairness | Statistically verified | Unproven |
| Regulatory Approval | Yes | No |
| Player Trust | High | Low |
| Payment Provider Support | Yes | Often restricted |
| Business Risk | Controlled | High |
FAQ
Is RNG mandatory for online casinos?
Yes. All RNG-based games must use certified RNG systems to meet regulatory and compliance standards.
Can operators choose their own RNG?
Operators rely on game providers’ RNG systems, which must be independently certified.
Does RNG apply to sportsbook betting?
No. Sportsbook outcomes depend on real-world events, not RNG.
How often is RNG tested?
Testing frequency varies by regulator, but periodic audits and re-certification are standard.
About Gamingsoft
Gamingsoft is a leading provider of online casino solutions, offering a comprehensive suite of services, including a white-label solution, API integration, payment solutions, game development, and more, to iGaming operators worldwide. With over years of experience, Gamingsoft has earned a reputation for delivering innovative and reliable solutions, helping clients succeed in the competitive iGaming industry.
