Aim with the mouse and click to shoot. Press R to reload your weapon, and use number keys to switch between picked-up weapons. The crosshair is your aim - hover over enemies to target them.
On mobile, tap-and-drag to aim and tap a fire button to shoot. Survive each wave by killing all zombies; pick up ammo dropped from kills.
Headshots First - Body shots take 2-4 hits depending on weapon; headshots are usually one-shot kills and conserve ammo dramatically. Reload During Calm - Don't reload while a fast zombie is closing the distance; create space first, then reload.
Learn Each Zombie's Hit Box - Some zombies have small heads (skinny shamblers) and others are large targets (brutes); aim accordingly. Save Special Ammo - Shotgun and rifle ammo is finite per wave; use them on the toughest enemies, not on the basic shamblers.
Don't Spray and Pray - Two careful aimed shots almost always beat ten panic shots; controlled fire conserves ammo and increases hit rate.
