Survival Mode is returning, when a new patch will bring the six-player free-for-all multiplayer mode to Metal Gear Solid Online next week. The mode has featured in earlier entries in the series, and it'll be reappearing around April 7 with the next update from Konami. When it does land, it'll be freely available to anyone who has the paid-for Cloaked in Silence expansion, while everyone else will be limited to playing it a mere ten times a week. You can read more about the planned update by hitting this link.