Invaders:
=========

Shoot the bad(*) guys, invade the base. Shoot all the purple "thingies"
to get reinforcements. Shoot the computer in the centre to win.
But does anyone know what the coffee does?



Defenders:
==========

Shoot the bad(*) guys, defend the computer. Defend for long enough
and you get reinforcements. Keep those door keys safe.



* That's politics for you.