Offspring Portal
Teleports tamed juveniles and breedable eggs from breeder portals. Dynamic species discovery from breeding pens. Dual-purpose egg collector portal. Mod creature support.
Screenshots 1 screenshots
About this mod Author’s original text
Offspring Portal
Version 1.4.4 — Valheim 1.0.x production release (solo, hosted, and dedicated).
Automate your breeding pens. Offspring Portal teleports tamed juveniles from your breeder area to distant maturing pens the moment they wander into range — keeping vanilla population caps from stalling production.
Press E on juveniles to toggle follow/stay — useful for leading piglets and wolf cubs through portals or into pens before they grow up.
Build a portal, name it, configure it once, and let the mod handle the logistics.
At a glance
| Portal type | What it does |
|-------------|--------------|
| Breeder | Sends juveniles out to matching maturing pens |
| Maturing | Receives juveniles; optionally forwards grown adults |
| Farm | Receives adults routed back from maturing pens (by species) |
| Cull | One shared yard — receives adults marked for slaughter |
Juvenile follow: With EnableFollowCommand on (default), look at a tamed juvenile and press E to toggle Follow / Stay. Works on boar piglets, wolf cubs, and other juveniles still growing up.
Minimum setup: 2 portals (Breeder + Maturing). Farm and Cull are optional when you want adult automation.
Build cost: 20 Fine Wood · 10 Greydwarf Eyes · 2 Surtling Cores
Juvenile follow command
When a juvenile is still growing (has not reached its adult form), you can command it directly:
- Aim at the tamed juvenile — hover shows Follow or Stay
- Press E to toggle
- Press E again to make it stay
This is separate from portal automation: follow helps you move juveniles; portals teleport them when they enter a breeder's scan radius.
Toggle in config: EnableFollowCommand in BepInEx/config/offspringportal.mod.cfg (default: true).
How juveniles move
Breeder Portal Maturing Portal
(at breeding pen) ────────► (at grow-up pen)
Role: Breeder Receives: Boar / Wolf / Hen / All …
- Place a portal at your breeding area → configure as Breeder
- Place a portal at your grow-up area → configure as Maturing → set Receives to a species (or All)
- When a tamed juvenile enters the breeder portal's scan radius, it teleports to the next available maturing pen for its species (round-robin if you have several)
Hover any portal to see its Name, role, and warnings.
Maturing pen destinations (adults)
Each Maturing portal has one Receives species (or All) and one Destination for adults that grow up on that portal. The mod applies that destination to every adult of the species that portal receives.
When juveniles grow up, the maturing portal can optionally move adults elsewhere:
| Destination | Behavior |
|-------------|----------|
| None | Adults stay on the maturing pen (default — great for a simple 2-portal setup) |
| Farm | Adults teleport to a Farm portal matching their species (or All) |
| Cull | Adults teleport to your Cull yard — one Cull portal serves every species |
If Destination is Farm or Cull but no receiver portal exists yet, you'll see a yellow hover warning and adults won't teleport until you place one.
Mixed species, different outcomes: Use one Maturing portal per species when adults need different destinations (e.g. boars → Cull, wolves → None). Place them in the same building if you like — the Breeder sends each juvenile to the Maturing portal whose Receives matches that species. You do not hand-sort animals; the portal network routes them.
Example setups
Starter — 2 portals (juveniles only)
Perfect first build. No adult routing needed.
| Portal | Type | Receives | Destination | Name example |
|--------|------|----------|-------------|--------------|
| Breeding area | Breeder | — | — | Boar Farm |
| Grow-up pen | Maturing | Boar | None | Boar Maturing |
Juveniles leave the breeder automatically. Adults stay on the maturing pen until you handle them.
Boar production + cull automation
Cull grown boars without walking them across the map.
| Portal | Type | Receives | Destination | Name example |
|--------|------|----------|-------------|--------------|
| Breeding pen | B
Install & use Install: BepInEx plugin
- The archive from playbuff is the mod itself — usually a BepInEx plugin (a .dll or a plugin folder once unzipped).
- Recommended: use a community mod manager (such as r2modman) — pick this game, import the mod, and the manager sets up BepInEx and its dependencies for you.
- Manual route: install the BepInEx loader in the game folder, then drop the unzipped .dll or plugin folder into BepInEx/plugins/.
- Launch the game — the BepInEx console logs every plugin it loads; seeing this mod in the log means it is installed.
Mods with listed dependencies need those installed too, or they will not load. Options are usually changed in-game or in the plugin's config file. In multiplayer, the host and every client need the same mods installed.
Install these first, or the mod will not work: