May 31st will be the "conclusion of online multiplayer support" as the GameSpy service shuts off. Both games' single-player campaigns are "unaffected by this transition,".
If you happen to own Xbox 360 or PS3 Crysis 2 then multiplayer will remain an option. Crytek apologise to the "small but dedicated community" of online PC gamers.
"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," Crytek.
"The single-player campaigns in both games are unaffected by this transition, and the multiplayer mode in the Xbox 360 and PlayStation®3 versions of Crysis 2 remain playable."
"We'd like to thank everyone who has taken up arms in Crysis and Crysis 2's multiplayer modes in the last few years, and apologize to the small but dedicated community of PC players who are still actively competing against one another."
Ahas been compiled of all the affected games when GameSpy shutsdown May 31st.