Once the upcoming "Napalm & Cordite" map pack for Killzone 2 is released tomorrow, there'll be three such packs on the market. And in case you don't have any of them, Sony have bundled the lot.
This compendium will be called the - wait for it - "Map Pack Bundle", and will sell for $US12. It'll include not just everything that comes with "Napalm & Cordite", but everything that came with "Steel & Titanium" and "Flash & Thunder" as well.
It'll be made available tomorrow, as part of the same PlayStation Store update that'll bring "Napalm & Cordite".