How to play

Move with WASD or the left touch zone, aim with your mouse or the right touch zone, and hold to keep firing. Zombies pour in from every edge in waves that grow bigger and faster, and your score is the wave you fall on. Quick kills build a combo that multiplies points, and downed zombies sometimes drop glowing pickups: health, or a temporary shotgun, machine gun, or rocket launcher.

Tips

• Never stop moving. Circling the edge of the arena strings the horde into one tidy line you can mow down.
• Red runners sprint and skinny past your aim. Drop them the moment they spawn, then thin the crowd.
• Exploders (the yellow ones) blast their own friends. Shoot them while they are still inside the pack.
• The combo fades after a couple of seconds without a kill, so save the rocket and machine gun ammo for dense packs.