Killzone HD hits October 23 - GameSpot

Sony offering Guerrilla's 2004 shooter as $15 stand-alone download on PlayStation Network next month; game boasts 720p graphics at 30fps with trophies.
The Killzone Trilogy is a compilation pack that includes the original Killzone, Killzone 2, and Killzone 3, as well as all the multiplayer packs for Killzone 2 and Killzone 3.

Killzone 3 Review - GameSpot

News - July, 2013

Killzone 2 Videos for PlayStation 3 - GameFAQs

Killzone HD Coming to PSN October 23rd, Trophy List Revealed – PlayStation.Blog

Most anticipated games from E3 2010 (photos) - CNET

MCV559 October 16th 2009 by Intent Media (now Newbay Media Europe) - Issuu

Killzone is long overdue a comeback - do it Sony, you cowards

Killzone HD' coming solo to PlayStation 3 on October 23rd - Polygon

Wait, I have to use BOTH sticks?! : r/agedlikemilk

Killzone HD Coming to PSN October 23rd, Trophy List Revealed – PlayStation.Blog

Killzone: Liberation - Wikipedia

Killzone HD Review (The Halo Killer?) - Gggmanlives