What Is RNG?

RNG stands for Random Number Generator. It is the core technology that determines the outcome of virtually every arcade and online game you play — from spinning slot reels to fish shooting games. Understanding how RNG works helps you make sense of game behavior and sets realistic expectations about outcomes.

At its simplest, an RNG is an algorithm that continuously produces sequences of numbers at extraordinary speed — often thousands of times per second. Each number corresponds to a specific outcome in the game, such as which symbols land on a slot reel or whether a target in a fishing game yields a prize.

Two Types of RNG

1. True RNG (TRNG)

True RNG uses physical phenomena — like electronic noise or radioactive decay — to generate numbers. Because these inputs are inherently unpredictable, TRNGs produce genuinely random results. However, they are slower and harder to implement in digital games, so they are rarely used in consumer-facing arcade titles.

2. Pseudo-RNG (PRNG)

Pseudo-RNG uses mathematical algorithms seeded with an initial value (called a "seed") to generate number sequences that appear random. While technically deterministic — meaning the same seed produces the same sequence — the seed changes constantly (often using system clock data), making outcomes practically unpredictable in real-world play.

Most online arcade game providers, including CQ9, FaChai, and Dragoonsoft, use certified PRNG systems.

How RNG Applies to Different Game Types

  • Slot Games: Each spin triggers the RNG to select a combination of symbols. The result is determined the instant you press spin — not as the reels are visually spinning.
  • Fishing Games: RNG determines the probability of each fish being "catchable" and the payout value when caught. The cannon you aim is simply a visual element.
  • Crash Games (e.g., Aviator): The RNG calculates the multiplier value at which the round will end before the round even begins, with results being publicly verifiable through provably fair systems.
  • Card Games: RNG shuffles the virtual deck, ensuring each deal is statistically independent from the last.

What Does "Certified RNG" Mean?

Reputable game providers submit their RNG systems to independent testing laboratories for certification. These labs — such as eCOGRA, iTech Labs, or BMM Testlabs — verify that:

  1. The RNG produces statistically random results over millions of iterations
  2. No external party (including the provider itself) can predict or influence outcomes
  3. The Return-to-Player (RTP) percentages advertised are accurate

When you see a provider advertising "certified RNG," it means an independent body has validated these claims.

Understanding RTP and How It Relates to RNG

RTP (Return to Player) is expressed as a percentage — for example, 96% RTP means that over a very large number of plays, the game returns 96% of total bets as winnings. This figure is calculated and enforced through the RNG's probability settings.

Important: RTP is a long-term statistical average. In short sessions, actual results can vary wildly above or below this figure. This is called variance or volatility.

Common Myths About RNG — Debunked

  • Myth: "A game is 'due' for a win after a long losing streak." — False. Each outcome is independent. Past results do not influence future ones.
  • Myth: "Playing at certain times increases win chances." — False. RNG operates continuously and doesn't adjust based on time of day.
  • Myth: "Bet size affects RNG outcomes." — False. Bet size affects payout values, not the randomness of the result.

Key Takeaway

RNG is the invisible engine behind every arcade and online game you play. Understanding it helps you approach games with clear expectations — outcomes are random, RTPs are long-term averages, and no strategy can override the mathematics baked into the system. Always look for providers with certified RNG systems as a sign of fairness and transparency.