Pilot Guide
MX-409 The Big Gun
These bad boys are actually low-earth-orbit (LEO) fusion power stations that were built by Invercargill Fusion Systems Ltd. as part of the Siren Interplanetary Grid System. Once the attacks began, these power satellites were quickly reconfigured as energy weapons. Although there are many of these powerful defensive systems in LEO, their irregular orbits make them usable only intermittently during a particular attack.
MX-409 usage

When the bigGun icon appears onscreen, grab it by simply touching it - this will connect your interface to the bigGun that's nearest in orbit.

Aim the gun by poking at the warp interface screen where you want to fire. Each press of the screen fires off a few plasma bullets, so touch the screen rapidly for maximum damage to the alien AVIAN invaders.

Join the Orbital Defense Force today!