Disclaimer: Most of mods I work with are some old and outdated ones that their authors haven't updated so far to match 1.0. I am not a professional modder myself, but I am good with coding and gaming. If you experience any problems with the mods I published, you can find me in Hexium discord server by typing DMT.

BreedingUpgrades

A Valheim mod that gives offspring of your tamed creatures a rare chance to spawn with an extra star. Fork/update of Dumba's BreedingUpgrades, maintained for Valheim 1.0.x.

GitHub: DaiMinhTri/BreedingUpgrades

Features

Star Upgrades

Offspring have a configurable percentage chance (default 5%) to gain a star level when born.

Egg Support

Works for both mammals (Wolves, Lox, Boars, Moose) and egg-layers (Chickens, Asksvin). Eggs are intercepted during procreation and upgraded in the same roll.

Moose (Deep North)

Moose uses the standard Tameable/Procreation components, so star upgrades apply to calves and carry over when they grow up.

Server-Side Control

Configuration is locked by default and synced from the server using embedded ServerSync. Clients cannot change settings unless the server allows it.

Breeding Limits (On by Default)

Configurable population cap per species. When enabled, breeding stops when the species limit is reached nearby. Supports Boars, Wolves, Lox, Chickens, Moose, and Asksvin.

Config Hot-Reload

Edit the .cfg file while the game is running — changes are picked up automatically without restarting.

Console Commands

Command	Description
breeding_info	Display mod status and current configuration
breeding_simulate [count]	Simulate breeding rolls (default 100)
breeding_debug	Toggle debug logging on/off

Configuration

A configuration file is generated at BepInEx/config/DMT.breedingupgrades.cfg after the first launch.

Section	Setting	Default	Description
General	Lock Configuration	On	Lock config to server admins only
General	Enable Mod	On	Master toggle for mod functionality
Breeding	Upgrade Chance	5.0%	Percentage chance for offspring to gain +1 star
Breeding	Max Star Level	2	Maximum star level for offspring (0-10). Values above 2 require CLLC or similar mod
Breeding Limits	Enable Breeding Limit	On	Enable custom population cap per species
Breeding Limits	Max Boars	5	Max boars nearby before breeding stops (3-20)
Breeding Limits	Max Wolves	5	Max wolves nearby before breeding stops (3-20)
Breeding Limits	Max Lox	5	Max lox nearby before breeding stops (3-20)
Breeding Limits	Max Chickens	5	Max chickens nearby before breeding stops (3-20)
Breeding Limits	Max Moose	5	Max moose nearby before breeding stops (3-20)
Breeding Limits	Max Asksvin	5	Max asksvin nearby before breeding stops (3-20)
Debug	Enable Debug Logging	Off	Verbose logging for troubleshooting (not synced)

Note: Max Star Level above 2 requires CLLC or a similar creature level mod. Without it, upgrades will cap at 2 stars (vanilla limit).

Compatibility

Creature Level Mods

• CLLC (CreatureLevelAndLootControl) - Did not check with the latest updates.
• Star Level Systems - Was not compatible in the past, and I haven't tested, because I don't use it.

Installation

1. Install BepInEx
2. Download and extract BreedingUpgrades.dll into your BepInEx/plugins/ folder
3. Launch the game to generate the config file

Future Plans

Mutation System

Rare traits (speed, health, damage) beyond stars. Creatures can inherit mutations from parents with configurable chance per trait.

Credits

• Original mod by Dumba (Discord: dumba7435)
• ServerSync library by Blitz

Buy Me a Coffee

If you enjoy this mod, consider buying me a coffee:

Changelog

1.0.4

• Added configurable breeding limits per species (Boars, Wolves, Lox, Chickens, Moose, Asksvin)
• Switched config sync to embedded ServerSync (v1.0.12)
• Breeding limits now enabled by default, max range changed to 3-20
• Cleaned the informative part of the mod

1.0.3

• Bumped BepInExPack dependency to 5.4.2350
• Confirmed Moose (Deep North) support
• No functional changes - patch targets verified compatible with 1.0.12

1.0.2

• Improved egg upgrade reliability when multiple animals breed at the same time
• Enhanced CLLC detection
• Added console commands: breeding_info, breeding_simulate, breeding_debug
• Added configuration validation
• Reorganized code for better maintainability

1.0.1

• Added automatic detection for CLLC (CreatureLevelAndLootControl)
• Fixed config incompatibility that sometimes caused upgrade failures
• Updated config descriptions with compatibility information
• Documented Star Level Systems incompatibility

1.0.0

• Initial release
• Added ServerSync for config enforcement