INVERSION is a third-person co-op shooter that combines hard-hitting, adrenaline-pumping action with a revolutionary gravity manipulation engine. Taking players on a whirlwind journey complete with nonstop firefights and a suspense-filled storyline, Packed to the brim with action, INVERSION also introduces revolutionary gravity-wielding combat, zero gravity environments, vector changes, and a unique destructible cover system.
Shipping is $4.90 (per shipment) to anywhere in Australia. Shipping rates: http://www.mightyape.com.au/help/shipping-information/
This can be had for ~$7.25 from their NZ site with code HALOGEDDON.