Due to GameSpy’s matchmaking services going down on May 31, Crysis and Crysis 2 are going to be single-player if you’re playing on PC. Should own the Xbox 360 or PS3 versions, you have nothing to worry about.
Crytek wrote the following statement on their forums.
As of May 31 this year, the multiplayer modes in Crysis and Crysis 2 for PC will no longer be playable. The conclusion of online multiplayer support comes as a result of GameSpy Technology shutting down all their hosting services. GameSpy have been providing multiplayer functionality for Crysis and Crysis 2 since they launched.
GameSpy made the announcement earlier this month. The service began as a Quake server search program in 1996 before hosting online multiplayer for hundreds of games. Other games seem to be handling this transition more smoothly, though, as EA said it will shift multiplayer for its older Battlefield games from GameSpy to Origin last week.