- Normal zombies are much harder to knock over, and they will actually get up if they do fall
- Zombies have insane healing abilities, allowing regenerating lost limbs if not killed within a minute or so
- To make it so you can actually lose to zombies at higher tiers, much stronger boss giant zombies will also appear. They will try to grab, throw or kick the player and tear/bite limbs off even with armor on if not fought off
High-quality artistic renditions of how it could look like:
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Zombie healing
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Giga zombie boss attack