MGS 5 Event "Skulls Attack" ( Mar. 24, 2016 - Jun. 07, 2016 ). All mission Tasks, Base Development platform. |--| Tasks:. Neutralized 1 security guards with missiles. Neutralized 3 security guards. Fultoned 3 security guards. Infiltration Successful. Infiltration Successful: Within 300 seconds. Infiltration Successful: Equipment grade 5 or below. Infiltration Successful: Dressed in combat fatigues. Event Point rewards:. - [S++ Staff] (Exchange limit: 1). - [S+ Staff] (Exchange limit: 10). - [S Staff] (Exchange limit: 10). Metal Gear Solid V: The Phantom Pain S-Rank Walkthrough -.