Sony has already released HD collections for most of its library, but now Killzone fans have a reason to go back and play one of Sony's premiere shooter series.

The PlayStation Blog revealed the Killzone Trilogy earlier today. The first entry in the series will be given a 720p HD makeover along with full Trophy support. And entries 2 and 3 will also include their multiplayer map packs free of charge. This includes:

Killzone 2 Map Pack Bundle

  •     Steel & Titanium Map Pack
  •     Flash & Thunder Map Pack
  •     Napalm & Cordite Map Pack

Killzone 3 Map Pack Bundle

  •     Killzone 3 Steel Rain Map Pack
  •     Killzone 3 Retro Map Pack
  •     Killzone 3 From The Ashes Map Pack

Check out the trailer and screen below. Killzone Trilogy releases on October 23 for $39.99.