First, the games that are going offline for good come May 31:
Civilization Revolution (PS3)*
Close Combat First to Fight (PC / Mac)
Jetfighter V: Homeland Protector (PC)
Stronghold 2 (PC)
Stronghold Legends (PC)
Top Spin (PS2 / PC)
Top Spin 2 (PC / DS)
Vietcong Demo (PC)
Vietcong Fist Alpha (PC)
Vietcong 2 (PC)
Vietcong 2 Demo (PC)
MLB Fantasy All-Stars (DS)
Sid Meier's Civilization Revolution (DS)
Major League Baseball 2K9 Fantasy All-Stars (DS)
NHL 2K10 (Wii)
NBA 2K10 (Wii)
*2K says it is currently looking into the "technical feasibility" of transitioning Borderlands (PS3) and Civilization Revolution (PS3) to another network. But that's all we know right now. Of course, you'll still be able to play all of these games offline.
Also on May 31, the original Borderlands (PC) and various Civilization games will temporarily go offline while 2K completes a server transition from GameSpy Technology to Steamworks. During this time, players will experience interruption of online play, matchmaking, and VOIP. Offline play is unaffected.
Below is a list of 2K games that will be transitioned to Steamworks starting May 31.
Civilization III: Conquests
Civilization III: Play the World
Civilization IV: Beyond the Sword
Civilization IV: Colonization
Civilization IV: Warlords
"We apologize for the inconvenience this may cause," 2K said in a statement.