Zombio

The goal

Grumpy zombies are coming. Blast them with cure goo to turn them back to their happy selves. Clear a wave, then answer a question on biological molecules to unlock the next one.

Keyboard & mouse

Look

Mouse or trackpad turns left and right (click the arena first; Esc frees the mouse), or ← →. The view stays level; aim assist does the rest

Move

W A S D or ↑ ↓

Goo blast

Hold Space or click

Grenade

R (or 1 and 2) to switch (1 to start, more in ? blocks)

Jump

Shift (or J)

Slide

C while running: duck under a zombie’s grab

Build

Q wall · E ramp

View

V for 1st / 3rd person

Dance

G

Pause

P or Esc

Sound off

M, or the speaker button

Tablet

Drag on the left half to move and on the right half to look. Buttons on screen for goo, jump, wall, ramp, dance and view. Aim assist switches on automatically.

Gear

Pick your gear before each game: Goo Blaster (all-rounder), Bouncy Balls (ricochet off everything), Feather Duster (tickle up close, hits a whole crowd), Water Bombs (lob for a big splash), Bubble Wand (traps a zombie in a floating bubble) or Confetti Popper (wide party burst).

Building

Walls and ramps cost 3 blocks each. Every cure earns a block. Zombies can't walk through walls but slowly wear them down. Run up a ramp onto a wall to escape for a while.

Questions

After each wave you must answer correctly to carry on. Get one wrong and you'll see the right answer, then get a new question, until you get one right. Right first time earns an upgrade. Missed ones come back later.

Levels and answers

Pick a level before each game. Pick a topic first. Levels set the questions: Easy is middle school, Medium GCSE, Hard AP and IB. The zombies are the same on every level and get tougher wave by wave: runners from wave 3, brutes from wave 5. Choose multiple choice or type your answers. Each level has its own leaderboard.

Power-ups

Walk into a yellow ? block and answer to choose a prize: hearts, a bubble shield, turbo goo, blocks or a cure wave. Then go double or quits on one more question, or keep what you won. Get slimed out of hearts? Answer correctly (new questions until you get one) to bounce back once per wave. Still out? You get 3 continues per game that keep your wave, score and upgrades.