The "PKG" format refers to the standard package file used by the PlayStation 3 to install digital content. Users typically search for the for several reasons:
In the landscape of downloadable games for the PlayStation 3, few titles capture the spirit of chaotic, cooperative fun quite like Castle Crashers . Developed by The Behemoth and originally released on Xbox Live Arcade, the game’s eventual arrival on Sony’s console came in the form of a digital file, often distributed as a package. For PS3 users, understanding the PKG format is essential not only for installing this beloved beat-’em-up but also for appreciating how digital distribution reshaped the console’s library in the late 2000s. Castle Crashers Pkg Ps3
If you have CFW (Evilnat/Rebug):