hmmmmm

Which ones? Can u name them?

sure, I now only remember one sadly.
*Chronicles of the Polar War
this one has no zombies but it does have the mc survive through the whole world freezing over, it has a comedy element to it in later chapters
* Return Survival
it's more a regression than system based but it is a zombie apocalypse. I love the mc here because he's very strict and doesn't let people walk over him

Thankyou so much ^_^