Zombie Infection Expansion

Zombie Infection Expansion greatly enhances the AI and growth mechanics of vanilla zombies, turning them into a true survival threat. After installing this mod, zombies will actively attack almost every creature; attacked targets become afflicted with the "Zombie Infection" status effect, and if they die while infected, a new zombie spawns on the spot. Moreover, each kill a zombie makes permanently strengthens it, creating a snowballing danger.

 

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Mechanics

 

Zombie Attack Targets

 

· Vanilla: zombies only attack villagers and players.

· With this mod: zombies expand their attack range significantly. They will actively attack all living creatures except other zombies and creepers, including but not limited to: pigs, cows, sheep, wolves, iron golems, skeletons, spiders, etc.

 

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Infection Effect (Zombie Infection)

 

When a zombie lands a hit on a target, the target receives the "Zombie Infection" status effect for 60 seconds.

 

· During the effect, green particles continuously appear under the target's feet as a visual cue.

· The effect itself deals no damage; it only marks the creature as "infected".

 

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Infection Death – Spawning New Zombies

 

If an infected creature dies while the effect is still active, its corpse immediately spawns a brand‑new zombie at the death location.

 

The newborn child zombie inherits part of the "parent" zombie's stats:

 

· Base health = 10 hearts (half of the vanilla zombie's 20 hearts) + 70% of the parent's accumulated bonus health.

· Base attack damage = 1.5 hearts (half of the vanilla zombie's 3 hearts) + 70% of the parent's accumulated bonus attack damage.

 

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Balance – Infection Chain Limit

 

To prevent performance issues from infinite propagation, the infection chain is limited to 3 generations:

 

· Zombie A infects creature B → B dies and spawns zombie C → C can still infect → but creatures infected by C (generation 3) will not spawn new zombies upon death.

 

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Zombie Growth – Kill Strengthening

 

Each time a zombie kills a non‑zombie, non‑creeper enemy, it gains permanent stat boosts:

 

· Maximum health +1 heart (and instantly healed to full health)

· Attack damage +1 heart

 

These bonuses accumulate permanently on the zombie and never decay over time. A zombie that survives long enough and racks up enough kills can grow into an extremely terrifying high‑health, high‑damage monster.

 

Growth stats are also passed down through the infection chain, with a 70% inheritance rate to child zombies spawned by it.