The term refers to the PlayStation 3 package file format ( .pkg ). Official DLC from PSN comes as a .pkg file that must be installed (and often requires a license/rap file).
Once confirmed, enjoy with the full roster — including landing Tyson’s uppercut or Ali’s shuffle. fight night round 4 dlc pkg
Note: Some were already on disc – DLC unlocks them fully. The term refers to the PlayStation 3 package file format (