Killzone Trilogy is an upcoming DLC for the Killzone series. It will include the very fist Killzone game in HD redesigned for the PS3. I don't know how many of my fellow admins here actually remember the first KiIlzone but like the wiki states it has several ways to play through the same mission. I honestly can't wait to download this. From what I know the HD pack will have all maps from the KZ series although I am not sure if there are any major gmaeplay changes.