: This is the most comprehensive "all-in-one" package. It is essentially a port of the PS2 classic, containing seven games: Metal Slug, 2, X, 3, 4, 5, and 6 .
If you're looking for a PKG file for Metal Slug on PS4, I couldn't find any direct links or information on how to obtain one. However, you can try checking the PlayStation Store for the Metal Slug Collection, which should be available for download. Metal Slug Ps4 Pkg
Metal Slug is legendary for its cooperative mode. The PS4 version supports local 2-player co-op, allowing a friend to jump in as the second player (Player 2) to double the firepower and revive each other during frantic boss fights. : This is the most comprehensive "all-in-one" package
A comparison of the (Anthology vs. individual releases). Details on the technical specifications of the PS4 ports. However, you can try checking the PlayStation Store
: A newer tactical RPG departure from the traditional run-and-gun gameplay. Availability and Pricing