Killzone 3 Helghast Edition and US pre-order bonuses detailed | VG247
Killzone 3 - Wikipedia
A friend of mine loves Killzone, this is his collection. I have to say I love the Killzone 2 multiplayer. It had its issues but things like the scout class made this
Amazon.com: PS3 Killzone Trilogy Collection - 2 Disc : Sony Computer Entertainme: Video Games
PS3 only does Helghast in sexy new Killzone 3 trailer – Destructoid
Killzone HD and the Trilogy now available for the PS3