Mob Amputation Mod 1.12.2, Wiki

Mob Amputation is a highly popular aesthetic mod created by iChun, inspired by the Mob Dismemberment mod. Unlike its predecessor, which focuses on mobs falling apart upon death, Mob Amputation allows for the removal of limbs while the mob is still alive. This adds a layer of visceral realism and tactical depth to combat, as removing specific limbs can directly impact a mob's ability to fight or move.

The mod is fully compatible with Survival Multiplayer (SMP) in versions 1.6 and later, ensuring that all players on a server see the same gory effects and limb removals. It primarily targets undead mobs, providing them with unique gibs (severed parts) and blood particles that linger briefly on the battlefield.

The primary mechanic of the mod is the Amputation Chance. Every time a player strikes a supported mob, there is a randomized probability that a limb (arm, leg, or head) will be severed. This chance is heavily influenced by the type of tool used.

Tool Efficiency Tiers

Different tools have varying success rates for amputation. Generally, edged weapons are the most effective.

Headless Death

If a mob's head is amputated, it does not die instantly. Instead, it enters a "headless" state where it will continue to wander or attempt to attack for a brief period (typically 3 seconds) before collapsing and dying permanently. This behavior can be toggled in the configuration file.

Physical Gibs

Severed limbs, known as "gibs," are treated as physical entities in the world. In older versions (Pre-1.6), these gibs could be punched or pushed around for entertainment. In modern versions like 1.12.2, they remain as temporary physical objects that eventually despawn to save on performance.

Mob Amputation specifically targets undead, humanoid mobs. While the original mod focused on three core types, later versions (1.10.2 and 1.12.2) expanded support to their variants.

Zombies & Variants

• Affected Mobs: Zombie, Husk, Drowned, Zombie Villager.
• Effects: These mobs feature red blood particles when limbs are removed. Removing arms reduces their visual threat, while removing the head triggers the delayed death timer.

Skeletons & Variants

• Affected Mobs: Skeleton, Stray, Wither Skeleton.
• Behavior Change: Skeletons have a unique mechanical change. If a Skeleton's bow arm is amputated, it can no longer fire arrows. Instead, its AI will switch to a melee-based attack pattern, charging at the player much like a Zombie.
• Note: Skeletons do not produce blood particles, only bone fragments.

Zombie Pigmen

• Affected Mobs: Zombie Pigman (Zombified Piglin in newer versions).
• Effects: Similar to Zombies, they produce blood particles. Removing their sword arm does not currently reduce their attack power but provides a significant visual indicator of damage.

The mod is highly customizable via the MobAmputation.cfg file located in the instance's config folder. Users can adjust the gore levels and the difficulty of the mod.

Mob Amputation requires iChunUtil to function. It is built to be lightweight and does not add new items or blocks, making it safe to add or remove from existing worlds without risking map corruption.

Modder API

For other mod developers, Mob Amputation provides a simple API to register custom weapons or entities for amputation support. This is done via the mod_Gibbing class:

• Add Custom Item: mod_Gibbing.addCustomItem(int itemID, double chance)
  • Allows non-standard weapons (those not extending ItemSword, etc.) to trigger amputations.
• Add Custom Entity: mod_Gibbing.addCustomEntity(int netID, double chance)
  • Allows custom mobs to be eligible for limb removal.

Known Issues

• Improved First Person Mod: There is a known rendering conflict with the Improved First Person mod. To resolve this, players must set easterEgg to false in the Mob Amputation configuration file.
• Health Indicators: Some health-bar mods may incorrectly display health bars over the individual severed limbs (gibs) as they are treated as entities.