🔬 How we sourced this guide. The structural model below is reverse-engineered from the community CRISPR Database, an open-source community tool whose published ~23 KB JSON dataset contains 18 known-good genomes (horse, dog, cow, tiger, monster, car, …) extracted from the actual game. The mechanic-level details are corroborated by 老番茄's Bilibili playthrough (7.3M views) where DNA Lab extraction is filmed at 12:01–12:42. Earlier drafts of horseygame.net used a wrong abstraction (20 sliders 0–15); this guide replaces it. Full source attribution on the Sources page.
If you've been building horses against a 20-slider mental model, you've been fighting the wrong abstraction. Here's the real one.
The structure: 20 helices × 2 alleles × GCAT bases
Each Horsey Game genome contains exactly 40 lines in the export format:
00:GCATGGCTTC
00:GCATGGCTTC
01:AACAGCATAGGAA
01:AACAGCATAGGAA
02:CATCGGTACGGGT
02:CATCGGTACGGGT
...
19:<allele a>
19:<allele b>
Three things that matter:
- 20 helices, indexed 00–19 (zero-based).
- Each helix has two parallel alleles. Two lines, same prefix. This is real biology — chromosomes come in pairs.
- Alleles are GCAT base-pair strings, not numbers. Helix 0 carries a 10-character allele (
GCATGGCTTC). Helix 1 carries 13. Helix 2 carries 13. The lengths are fixed per helix index, not per creature, and not per allele.
Across the 18 stored presets, each genome holds 480 bases in total (20 helices × 2 alleles, lengths fixed per helix). If every base could vary independently among 4 letters, the stored format allows 4^480 possible strings (our calculation). That counts strings, not viable or distinct creatures.
Why this changes your strategy
Inheritance: what the stored genomes can and can't show
The two-allele layout looks like paired chromosomes, so a common community assumption is that a foal receives one allele per helix from each parent and that hidden (recessive) alleles can resurface later. That is a hypothesis. The 18 static presets show the data format only; they contain no parent–offspring records, so they cannot confirm how inheritance or dominance works.
Cautious takeaway: until breeding records exist, a horse that does not show a trait may still be worth keeping as breeding stock; inheritance is not proven.
Horsey Game species presets in the DNA database
The community database contains 18 species presets:
horse · dog · cow · bug · goat · man · bear · tiger · giraffe · monster · car · rabbit · duck · sea · moose · croc · goblin · wheels
In the stored presets, non-horse entries such as man, car and wheels use the same helix layout as horse. That shows a shared data format; it does not by itself prove every cross-species splice works in game. Community examples are on the discoveries page.
Horsey Game helix allele length in the stored presets
Helix 1's allele is 13 bases long in all 18 stored presets. Whether the DNA Lab lets you change length is not shown in our sources; the presets differ in which letter sits at each position. So "the right G/C/A/T at position 7 of helix 12" is the search space, not "make helix 12 longer".
Two strands per helix: matching both alleles
To "lock in" a helix value, you need both alleles to match. The community calls this homozygosity. A horse with 00:GCATGGCTTC / 00:GCATGGCTTC has matching alleles at helix 0; one with 00:GCATGGCTTC / 00:GCATGAACTC does not. If inheritance follows standard paired-allele rules (not confirmed), the second horse could pass either strand to a foal. No source here shows that championships require matched alleles.
Horsey Game breeding stock: one player's advice
One player comment under 老番茄's video (BV1BM9fB8Eds, 2026-05-09, paraphrased from Chinese) suggests keeping strong natural horses from the opening as breeding stock instead of releasing or racing them out, and reports a personal-best ~5-second race on a heavily polarised horse. This is one player's advice, not a documented game feature or tested rule.
The right tool to edit the real DNA
We previously shipped a 20-slider Gene Editor on this site. It was the wrong tool for the wrong abstraction. It's been removed.
A good tool for this is our DNA Database — a browser-native editor that lets you load any of the 18 known genomes, edit individual base pairs across both alleles, and tag/save your work. It is built around the game's actual GCAT × 20-helix × 2-allele structure; other community tools exist too (see the Sources page), which is also where the original community-data attribution lives.
Open questions (we don't know yet)
- Which helix governs which trait? The 20-slider abstraction at least claimed "Helix 0 = Stamina, Helix 2 = Speed". With the real model, those mappings are unverified — any may be wrong, and the per-base position of a trait within an allele matters.
- Is there a recessive/dominant rule at all? No save-file extraction we know of has shown one.
- How does the gene drive (基因驱动 in 老番茄's playthrough) actually splice? The UI is filmed; the underlying probability mechanics are not.
If you've extracted any of the above from a save file, submit via /contact. We'll update with full credit.
Horsey Game DNA tasks and progression limits
For the in-game extraction, vat and simulator steps, use the CRISPR lab workflow. If the race panel or silver lasso behaves unexpectedly, consult the late-game troubleshooting reports; these distinguish official changes from community workarounds.
More Horsey Game DNA guides
- Opening Speedrun — the 6-step community chain to unlock the DNA Lab without a verified duration
- Hidden Secrets — cave bones, water rope, trophy NPCs, the top-left DNA bottle
- Horse Lifecycle: aging, retirement and daily limits — how long breeding stock lasts
- DNA Database tool — load presets and edit real GCAT alleles
Sources
- Community CRISPR Database — open-source 18-genome dataset, fetched 2026-05-09. The structural claims about helix count, allele duality, and base-pair format are derived from inspecting the published
default-database.json. Direct link on /sources. - 老番茄's playthrough — "这是什么马？？" — DNA Lab extract/inject UI demonstrated at 12:01–12:42.
- Player comments under that video, collected 2026-05-09 (Bilibili comment API does not preserve specific authors at fetch time; we'll backfill if commenters self-identify).
Editorial update: 2026-11-08. Community observations retain their cited source timestamps; their game builds are not confirmed. Official notes, where linked, are a separate dated source.