--- title: Correlated RNG | daily.dev description: Correlated RNG is a problem in games using multiple deterministic random number generators seeded from the same value — all generators produce identical... canonical: https://daily.dev/posts/correlated-rng-dm454zy39 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Correlated RNG | daily.dev og:description: Correlated RNG is a problem in games using multiple deterministic random number generators seeded from the same value — all generators produce identical... og:url: https://daily.dev/posts/correlated-rng-dm454zy39 og:image: https://api.daily.dev/og/posts/dm454Zy39.png og:image:alt: Correlated RNG og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Correlated RNG **[Lobsters](https://daily.dev/sources/lobsters)** · 7 min read · 0 upvotes · 0 comments ## Summary Correlated RNG is a problem in games using multiple deterministic random number generators seeded from the same value — all generators produce identical sequences, letting players exploit predictable patterns across systems. Three solutions are compared: using offsets (a bandaid), a dedicated seed-generator RNG (effective but order-dependent), and hash-based seeds (recommended). The hash approach seeds each RNG by hashing the shared game seed with a unique identifier string, ensuring fully independent sequences. A notable real-world example is Slay the Spire 2, where C#'s System.Random combined with additive seed combination caused correlated output; switching to xoshiro256** solved it. The Squirrel3 algorithm is also recommended for its speed, simplicity, and full-cycle guarantees. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Correlated randomness in Slay the Spire 2](https://daily.dev/posts/correlated-randomness-in-slay-the-spire-2-8tnfr0vgp) · Lobsters · 0 upvotes · 0 comments - [Medium](https://daily.dev/posts/medium-yqrq542nr) · Medium · 0 upvotes · 0 comments - [Ruby Random Numbers: How to Generate Them With Examples](https://daily.dev/posts/ruby-random-numbers-how-to-generate-them-with-examples-flyostzyh) · RUBYLAND · 0 upvotes · 0 comments --- Tags: [#game-development](https://daily.dev/tags/game-development) [View this post on daily.dev](https://daily.dev/posts/correlated-rng-dm454zy39) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Correlated RNG","url":"https://daily.dev/posts/correlated-rng-dm454zy39","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/correlated-rng-dm454zy39"},"datePublished":"2026-07-31T15:15:49.246Z","dateModified":"2026-07-31T15:58:27.222Z","description":"Correlated RNG is a problem in games using multiple deterministic random number generators seeded from the same value — all generators produce identical...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/5d96dc8cce39cfb867e7d9c4e587b22a?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/5d96dc8cce39cfb867e7d9c4e587b22a?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Lobsters","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Lobsters","logo":"https://media.daily.dev/image/upload/s--tl8v_Fku--/f_auto,t_logo/v1698841318/logos/lobste.jpg","url":"https://daily.dev/sources/lobsters"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/correlated-rng-dm454zy39","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"game-development","timeRequired":"PT7M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Lobsters","item":"https://daily.dev/sources/lobsters"},{"@type":"ListItem","position":3,"name":"Correlated RNG"}]} ```