SpawnForce

SpawnForce is a lightweight Fabric mod that forces specific entities to spawn by bypassing Minecraft's three canSpawn gates. Many modded mobs (AdventureZ orcs/shamans/fungi, Marium's Soulslike Weaponry bosses, and others) ship with strict spawn predicates (light level, specific blocks, biome hardcoded lists) that prevent them from ever appearing in custom biomes - even when a datapack or worldgen mod declares them. SpawnForce lets you whitelist entity IDs in a config file and bypasses those checks only for them.

Features

• Config-driven whitelist: list any entity ID (modid:entity_name) in config/spawnforce.json and it will spawn where biome/mobcap allow
• Bypasses the three vanilla spawn gates:
  • SpawnHelper.canSpawn (location check: ground, block type, light)
  • SpawnRestriction.canSpawn (registered spawn predicate)
  • MobEntity.canSpawn (per-mob override)
• Each gate has its own toggle - enable only what you need
• Optional debug logging shows bypass hits per entity and periodic stats
• Mod-agnostic: works with any mod's mobs, no hardcoded list
• Does NOT touch mobcap, spawn weight, or biome tags - a mob still needs to be declared in a biome (vanilla spawners or Big Globe bigglobe_extra_mob_spawns, etc.)

Configuration

{
  "enabled": true,
  "debug": false,
  "bypass_spawn_helper_can_spawn": true,
  "bypass_spawn_restriction": true,
  "bypass_mob_entity_can_spawn": true,
  "force_spawn_entities": [
    "adventurez:orc",
    "adventurez:soul_reaper",
    "soulsweapons:draugr_boss"
  ]
}

• enabled: master switch
• debug: logs each bypass + 10s summary to console
• bypass_*: toggle each gate individually (leave all true unless you want finer control)
• force_spawn_entities: the whitelist. Missing IDs are ignored with a warning

Restart the game after editing.

Recommended For

• Modpacks combining mob mods with custom worldgen (Big Globe, Terralith, Biomes O' Plenty, etc.) where modded mobs refuse to spawn
• Adventure/RPG packs that need specific mobs in specific biomes without writing Java patches
• Anyone using In Control! on Forge who needs the equivalent "result":"allow" on Fabric

Used in the Legends Reborn: Medieval modpack.