None. Sony has not announced or released any Windows version of this specific title.
Official online multiplayer servers were permanently shut down on August 12, 2022 . However, community "revival" projects have since restored some multiplayer functionality for users with modified hardware. PC Compatibility via Emulation Killzone Mercenary Game Download For PC Full Ve...
Guerrilla Cambridge / Sony Computer Entertainment. 2022 . However
There is no "native" download for PC. The only method to attempt playing the game on a computer is through a like Vita3K , though performance is highly variable: though performance is highly variable: