Guardian

Test your skill and reflexes to breaking point in an endless battle to halt the progress of the landers in their mission to capture humanoids from your planet surface. Stop them returning to outer space where they will eventually mutate and take up a deadly pursuit of your space fighter. And in between, look out for the flying pods, swarmers, alien bombers and deadly baiters; they're just as dangerous. It's embarrasing to be beaten by an overblown jellyfish, but we're sure you'll eventually go under.

You initially have three lives and three smart bombs (indicated after your score), but gain an extra life and smart bombs after every 10,000 points.