Fighting them.

Noise pulls them

Gunfire carries. A suppressor buys you the difference between one walker and a street of them.

Every bite counts

Damage is one problem, infection is the other. Armour with bite protection is worth more than raw armour value.

Numbers beat tiers

A tier-one walker on its own is nothing. Twenty of them between you and the door is how most runs end.

They evolve

The world's infection deepens over time, and the roster gets worse with it. Check where it stands with /zmutation.