Killzone has long been one of my FAVORITE PlayStation franchises that have ever existed, and it's a travesty that this IP has not seen any new games or releases this generation. The mainline trilogy should be preserved because it was one of many playstation IPs that shone at a time when Sony needed to be at their absolute best during the console wars of the 2000s. It's a bloody shame that Guerrilla Games treat it now as the black sheep of their portfolio, and Sony themselves have only acknowledged the franchise 3 times this gen - One rerelease of its PSP game, Liberation, the other two being from a T-Shirt seen in The Last of Us 2 Remaster and a small snippet of the Killzone 2 Intro from Playstation's anniversary video. To this day, the mainline trilogy (save for Shadowfall) have NOT been made available to purchase and play again on modern hardware (PS4 and PS5, because Sony simply won't) and I think that adds to the importance of preserving games such as these as well as the PsVita spinoff, Mercenary - heck, the story mode depicting a war - political and literal - as well as its multiplayer ALONE justifies the necessity to make sure the Killzone entries don't become stuck to PS3, or even worse, lost media. This franchise is one of many important IPs in Playstation's history that should be preserved...because like many of its other fellow ps franchises that we all grew up playing, they've been stuck in the closet for far too long.