Defend against the diaborbical Norb invasion that threatens your orbs.


Orb Defence Members' Benefits
  • Electroshock turrets and barriers
  • Defend against all 10 types of Norb
  • 5 more levels
  • Fullscreen mode
  • No adverts during gameplay


The Norbs are coming to attack your orbs and it is up to you to stop them! Build up your defences to push back the Norb advance; if your orbs are lost, you will fail! Construct your turrets to best defend against the invasion and upgrade them to provide better fire support. Watch out, though: Awesomeo, leader of the Norbs, is had better be prepared.


1. How do I get a higher score?

Pressing 'SPACE' will trigger the next wave early and increase your potential bonus score. This bonus, however, will only be applied if you the succeed in killing the next boss. If you lose an orb, this bonus will be lost along with it.

2. The Norbs keep destroying my orbs; what should I do?

Build a varied mix of turrets to defend yourself. Each turret has its own advantages and disadvantages, so make sure to use the turret that works best against the current wave of Norbs. You can upgrade your turrets by clicking on their bases when they are flashing, which will increase how much damage they do (and for some turrets, their range).

3. Why are my turrets not firing?

Certain Norbs are immune to some turrets. Flybos cannot be hit by big shot or beam blast turrets. Ironos are immune to ice shot and big shot turrets.

4. What are the minimum specifications for this game?

The minimum specifications we recommend for this game are:

  • 1.0 GHz
  • 128 MB RAM

The recommended specifications for getting the most out of this game are:

  • 1.5 GHz
  • 256 MB RAM

Below is an explanation of the terms in our technical specifications.

Megahertz (MHz) / Gigahertz (GHz) is a measure of how fast your computer's processor is. This affects how quickly you can run things like games and applications.

Megabytes (MB) are used to measure how much memory your computer has. This affects how quickly your computer runs when using large programs such as games, or when you run a lot of programs at once.

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Development Team

Development: Thomas D
Graphics: Kristian F, Laura W
Audio: Ian T
Quality Assurance: Michael T, Sally R, Joe C
Editing: Katie B, Stephen R

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