Rico-GeneticVariantsPatch icon


Adds some VarianceAPI functionality to GeneticArtifact

Last updated 4 months ago
Total downloads 4144
Total rating 0 
Categories Enemies Artifacts
Dependency string Rico-GeneticVariantsPatch-0.3.0
Dependants 2 other mods depend on this mod

This mod requires the following mods to function

bbepis-BepInExPack-5.4.2103 icon

Unified BepInEx all-in-one modding pack - plugin framework, detour library

Preferred version: 5.4.2103
RiskofThunder-R2API_Core-5.0.4 icon

Core R2API module

Preferred version: 5.0.4
Nebby-VarianceAPI-2.0.1 icon

VarianceAPI allows you to create Variants for CharacterBodies, Variants can have different textures, lights, skills, and more.

Preferred version: 2.0.1
Rico-GeneticArtifact-4.5.1 icon

Adds an artifact that emulates a genetic algorithm on monster stats.

Preferred version: 4.5.1


Basic Description

  • This mod adapts the stat-based learning system from GeneticArtifact to the variant selection system of VarianceAPI
  • This doesn't evaluate the performance of each variant, but instead suggests variants based on the stats they have
  • With the current math, each variant can be recommended anywhere between half and twice as often (subject to change)
  • Note: this mod does NOT require the Artifact of Genetics to be active to function, as it only runs IF the artifact is enabled

How it Works

  • Each variant in VarianceAPI has 5 stat multipliers, and 4 of these match GeneticArtifacts' choices
  • As the genetic learning system chooses which stats to prioritize, this mod will keep track of how well those match the variants' multipliers
  • If it discovers a close match, that variant will have it's spawn rate increased - poor matches will have theirs reduced

Known Issues/Planned Updates

  • This is a prototype build of this concept, so balance and polish haven't been taken care of yet
  • If you run into any bugs or have feedback, either reach out in the discord or contribute a issue on the github
  • Have a better idea for an icon? I'll gladly take it since the current one is not great


- Updated for VarianceAPI v2 (Nebby my beloved, make the catalog public)
  - Due to the new VAPI structure, the method of adjusting spawn rate isn`t super safe and may break on conflict
- Added config option to set the maximum effect this mod can have on each spawn rate (globally)
  - Default value is 0.5 - variants will be up to 50% more/less common than their base rate
- Fitness evaluation is much stricter now and uses fancier maths for the spawn rate tweaks
  - Simple variants are much more likely to spawn early into runs, but taper off as the algorithm learns
  - Extreme variants are unlikly to spawn early, but can dramatically increase later on

- Added ability to prevent variants from recieving the genetic bonuses it`s standard version would recieve
  - Added configuration option to enable/disable the above (enabled by default)
- Added configuration option to enable/disable the dynamic variant chance tweaking (enabled by default)

- Prototype release, expect things to be broken/unpolished


Place the .dll in Risk of Rain 2\BepInEx\plugins or use a mod manager.


If you have issues/suggestions leave them on the github as an issue/suggestion or reach out to Rico#6416 on the modding Discord.

Available versions

Please note that the install buttons only work if you have compatible client software installed, such as the Thunderstore Mod Manager. Otherwise use the zip download links instead.

Upload date Version number Downloads Download link  
2023-2-16 0.3.0 1720 Version 0.3.0 Install
2021-11-17 0.2.0 1655 Version 0.2.0 Install
2021-9-14 0.1.0 769 Version 0.1.0 Install