On the day of the 4th anniversary of Metal Gear Solid 4: Guns of the Patriots, Konami is closing the servers of Metal Gear Online. The separately playable online segment shipped with each copy of the aforementioned game.
Konami announced the closing of the servers earlier this year. In Japan, various events and competitions were held leading up to the finale of the online multiplayer game.
A sequel to Metal Gear Online hasn’t been announced so far, so it’s unclear what the future holds for the multiplayer component for the Metal Gear series.