To play the full single-player campaign, you must install the following specific packages: Campaign Pack 1 : Essential story mission data. Campaign Pack 2 : Remaining story mission data. Shared Content Pack 1 : Shared assets used across all modes. Shared Content Pack 2 : Additional shared data and engine assets. Installation & Troubleshooting Verification
The release string refers to a specific unofficial backup or "scene" release of the PlayStation 4 version of Call of Duty: Modern Warfare II