The original PS2 Killzone game will arrive with shiny new HD visuals and Trophies as part of a Killzone Trilogy bundle disc next month. But what if you already own Killzone 2 and 3?
Sony has you covered. The platform holder has confirmed that Killzone HD will be released as a standalone download via the PlayStation Store simultaneously with the Trilogy release.For US gamers that's October 23, and a day later for UK/EU/Australia.
The PS2 remake will cost $14.99/€14.99/£11.99/AU$23.95, and come with the same up-rezzed visuals and new Trophy components as the retail release.
You can get a full list of those Trophies on the PS Blog, if you're interested.

http://www.computerandvideogames.com...e-psn-release/