Genes are data-driven, which means you can make custom Genes using jsons in a datapack.

Gene definition jsons go in /data/namespace/geneticsresequenced/gene/. For example, the file /data/coolmodpack/geneticsresequenced/gene/example.json would make a Gene with the id coolmodpack:example.

The Gene's translation key is dynamically generated, using the pattern gene.namespace.path. For the above example, the key would be gene.coolmodpack.example.

The Gene's EMI Information recipe is also dynamically generated! It's the exact same as above, but with info. at the start. For example info.gene.coolmodpack.example.

The json itself

Every field in a Gene definition file is optional, making {} a completely valid json. In fact, several default Genes already use this!

The possible fields are:

• dna_points_required
  • An integer, defaults to 1
  • How many DNA Points are required to fill a Plasmid
• requires_genes
  • A list of Gene ids, defaults to []
  • The Gene will fade away if the entity doesn't have everything in the list
• allowed_entities
  • An entity type filter, defaults to {"type": "neoforge:any"}
    • Can also just use a single entity type id (minecraft:pig), or a list of entity type ids (["minecraft:cow","minecraft:player"])
  • Entities not in the list cannot have the Gene
• potion_details
  • A list of objects with the following fields:
    • effect
      • A mob effect id
    • level
      • The potions level (not its amplifier)
      • Optional, defaults to 1
    • duration
      • The amount of ticks the effect lasts
        • Generally not requires, since the potion is reapplied every couple seconds
      • Optional, defaults to -1 (infinite)
• attribute_modifiers
  • A list of objects with the following fields
    • attribute
      • An entity attribute id (like "minecraft:generic.max_health")
    • modifier
      • An object with these fields
        • id
          • A resource location for the attribute modifier
          • Should be unique
        • operation
          • One of the following:
            • "add_value"
            • "add_multiplied_base"
            • "add_multiplied_total"
        • amount
          • A number
• scares_entities_with_tag
  • An entity type tag, defaults to nothing
  • Entities with that tag run away from entities that have the Gene
• incompatible_genes
  • A list of Gene ids, defaults to []
  • The Gene will not be added to entities that already have any of the Genes in the list