What does RNG stand for? What RTS 7 requires of one
RNG stands for random number generator. The UK Gambling Commission's RTS 7, line by line: randomness, seeding, scaling, compensated games and near-misses.
RNG stands for random number generator: the software or hardware that produces the unpredictable numbers a game turns into results. Among players the acronym is also slang for luck itself. In gambling regulated in Great Britain, the UK Gambling Commission’s RTS 7 sets what an RNG must be able to demonstrate.
This is an evergreen explainer, with no news peg. On 1 November 2026 this desk read RTS 7 – Generation of random outcomes, whose page shows “Last updated: 7 May 2024” and NIST’s listing for SP 800-22. Of the four ranking pages checked for this post (a Reddit r/gaming thread, freeCodeCamp, SOFTSWISS and wikiHow), none quotes an RTS 7 requirement in the text read.
What does RNG stand for, and what kinds are there?
Three kinds matter to a trade reader:
- A pseudorandom number generator (PRNG) is an algorithm. It starts from a seed value and computes a sequence that looks random; anyone holding both the algorithm and the seed could reproduce it.
- A true random number generator (TRNG) samples a physical process, such as electronic noise, instead of computing the next value.
- A mechanical RNG is RTS 7’s own term for a game that uses “the laws of physics to generate the outcome”: a ball, a wheel, a drum.
What does RTS 7 require of an RNG?
RTS 7 applies to “Gaming (including bingo), lotteries, and betting on virtual events”. It binds Commission-licensed remote operators and suppliers serving Great Britain, and the page read here says nothing about other markets. Its aim is “to ensure that games and other virtual events operate fairly”. The right-hand column below is this desk’s reading, not the Commission’s text.
| RTS 7 line | What it says | What a game has to evidence |
|---|---|---|
| 7A requirement | Results “acceptably random”, shown to a high degree of confidence, for example by generally accepted statistical tests | Test results on raw output and on game outcomes |
| 7A requirement | Adaptive behaviour (a compensated game) not permitted | No logic that shifts odds during play |
| 7A guidance | Output uniform over its whole range; outcomes match theoretical probabilities | Distribution tests against the game’s maths |
| 7A guidance | Next number computationally infeasible to predict without the algorithm and seed | Seed and algorithm kept out of reach |
| 7A guidance | No cycling; two instances do not synchronise | Streams that neither repeat nor match |
| 7A guidance | Seeding and re-seeding introduce no predictability | A documented seeding method |
| 7A guidance | Any scaling keeps those qualities | Range mapping tested, not only raw output |
| 7A mechanical | Parts do not decompose (“a ball shall not disintegrate”); physical properties unaltered; no player contact with the mechanics | Maintained, closed mechanics |
| 7B | Numbers used in the order received; discarded only if out of range, with an error logged and investigated | An error log and its investigation trail |
| 7C | No substituted near-miss losses; a simulated device matches the real one (a coin’s heads “must be 0.5 every time”) | Game maths that match the device imitated |
One detail softens a strict reading: the adaptive-behaviour ban “is not intended to prevent” bonus features with a different set of rules, provided they are triggered by random events.
Does RTS 7 require NIST testing?
No. RTS 7 asks for “generally accepted tests and methods of analysis” and names no suite. NIST SP 800-22 Rev. 1, a cryptographic test suite, is one widely cited example. NIST’s page dates it April 2010 and carries a 2022 planning note saying NIST has decided to revise it. Its abstract adds that no set of statistical tests can absolutely certify a generator.
How is an RNG game different from a live dealer table?
An RNG game’s result is a number the software draws; a live table’s result comes off a wheel, shoe or deck in a studio. The Commission’s live dealer standard, RTS 17, covered in this site’s fairness explainer, audits the studio: equipment, croupiers, surveillance and logs. RTS 7’s mechanical-RNG lines describe balls and wheels, but the page does not say it governs a live stream, and this post does not claim it. The physical kit is in the studio equipment list, and the randomiser at a card table is covered in how cards are shuffled.
FAQ
What does RNG stand for in gaming?
Random number generator. In a video game it decides drops, hits and spawns; in a casino game it decides reel stops, card draws or ball numbers. Players also use the acronym on its own to mean luck. The meaning does not change between the two settings; what changes is who has to prove the generator behaves.
Why do people use the term RNG instead of just the word randomness?
Because it names the mechanism, not the effect. A game’s randomness is produced by a generator, often a pseudorandom one that computes its sequence from a seed, so RNG points at the system responsible for an outcome. That is also why a regulator writes rules for the generator, its seeding and its scaling, rather than for randomness in the abstract.
What is RNG in video games, and why do people criticize it?
It is the generator behind any chance-based event, from loot to hit rolls. The criticism usually targets design rather than maths: players object when chance outweighs skill. Video games outside gambling are not held to RTS 7. In gambling, RTS 7 bars a compensated game that adjusts odds during play, and it bars substituted near-misses.
Industry coverage for an adult, 18+ readership: Onkaji Scout offers no gambling services and does not say where to play. RTS 7 is read here as the evidence file an RNG game carries onto a regulated floor, and nothing in this post says a named game, supplier or test lab meets it.