Fast-forward to the present, and the Metal Slug series has made its way to the PS4 in PKG format. For those unfamiliar with PKG files, they are essentially digital packages that contain game data, allowing players to install and play games on their consoles without the need for physical media.
: Most entries support local two-player cooperative play, making them staples for couch gaming. Metal Slug 4 - Review Metal Slug Ps4 Pkg
For users who legally own a physical copy of a Metal Slug game: Fast-forward to the present, and the Metal Slug
1-2 player local co-op, DualShock 4 vibration support. 2. Metal Slug XX Fast-forward to the present
Replaying these difficult games becomes much more rewarding with the inclusion of PlayStation Trophies and Platinum milestones.