Playstation Plus membership (digital download) available for $29.99 at various online stores ...
I envy you getting to experience this for the first time.
So far I'm really enjoying it, but still getting used to the controls (in the air and in combat)
Well done :-)
Get a multiplier of 5x - RESOGUN
Save a human - RESOGUN
Complete level 'The Father' - Killzone Shadow Fall