Random Number Generator (RNG)
An RNG is the certified software algorithm that produces unpredictable outcomes for casino games — every spin, card and crash multiplier starts here.
What it means
A Random Number Generator is the algorithm that decides game outcomes: which symbols land on a slot spin, which card comes off the deck, where a crash multiplier stops. Online casinos use pseudo-RNGs — deterministic algorithms seeded with entropy — that pass statistical randomness tests. Before a game goes live in a regulated market, an accredited lab (GLI, BMM, eCOGRA, iTech Labs) certifies that its RNG output is unpredictable and that the realized RTP matches the published figure.
Why it matters for operators
RNG certification is a licensing requirement in every serious jurisdiction — UKGC, MGA and Brazil's SPA all require certified games, and running uncertified content is a fast way to lose a licence. It's also the trust backbone of the product: disputes about "rigged" outcomes are settled by pointing at the certificate and the game logs. When sourcing content through an aggregator, the operator still carries the obligation to confirm each title's certification covers the market it's offered in.
Example
An operator entering a regulated market submits its game catalogue for approval. Three titles from a new studio lack certificates for that jurisdiction — they stay switched off in the lobby config until the lab report lands, while the rest of the portfolio goes live.