"We are currently in the process of migrating Mortal Kombat 9 (for PS3, Xbox 360 and OC) from Gamespy's servers and expect things to go smoothly," the Facebook update reads. "During the transition, players may experience an interruption of online play and matchmaking and we ask for your patience during this time. Players will not experience interruptions to offline play throughout this process.
"After May 31, Mortal Kombat 9 for PS Vita will only support ad-hoc multiplayer."
GameSpy Technology, a service that provides multiplayer functionality for dozens of games on consoles, computers and mobile devices, announced earlier this year that it would shut down on May 31. A number of publishers with games that used GameSpy's services announced that their titles will be transitioned to other services.