It's a good time to be a Killzone fan: the Killzone Trilogy including the remastered Killzone HD is now available in shops for a cool $40. If it's just Killzone HD you're after, you can find it on PlayStation Network for a very reasonable $15.
Going along with this excitement is another Double XP weekend for Killzone 2 and Killzone 3, which begins Friday, 9pm PST.
Or, as Helghast Autarch Scolar Visari puts it...
“My people… Sons and daughters of Helghan… Today is a glorious day for our nation. For many years, our history was incomplete – divided, fragmented, and split up over multiple platforms. But on this day, the record of our great struggle is made whole. On this day, Killzone Trilogy is released for PlayStation 3!
Experience the power of the Third Helghast Army in the original Killzone, remastered in majestic HD. Witness the tyranny of the ISA as it attempts to seize Helghan in Killzone 2. Tremble before the awesome might of the Helghast war machine in Killzone 3. Then, go online and smite the enemy on any of the enclosed DLC multiplayer maps!
In honor of this momentous occasion, I have declared the coming weekend a Double XP Weekend. All acts of valor in online multiplayer matches of Killzone 2 and Killzone 3 shall be doubly rewarded! Go online and strike at your foes without fear or hesitation… Remind them, with every bullet fired and every drop of blood spilt, that Helghan belongs to the Helghast!”