2K Games announced today in a post on its Support site that as a result of the GameSpy Technology closure, it will transition some legacy games to Valve's Steamworks and end support altogether for others.

First, the games that are going offline for good come May 31:

Borderlands (PS3)*

Civilization Revolution (PS3)*

Close Combat First to Fight (PC / Mac)

Jetfighter (PC)

Jetfighter V: Homeland Protector (PC)

Leadfoot (PC)

Rune (PC)

Stronghold 2 (PC)

Stronghold Legends (PC)

Top Spin (PS2 / PC)

Top Spin 2 (PC / DS)

Vietcong (PC)

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.

Borderlands (PC)

Civilization III

Civilization III: Conquests

Civilization III: Play the World

Civilization IV

Civilization IV: Beyond the Sword

Civilization IV: Colonization

Civilization IV: Warlords

"We apologize for the inconvenience this may cause," 2K said in a statement.

2K is not the only publisher facing issues from the impending closure of GameSpy. Crytek announced last week that the PC versions of Crysis and Crysis 2 are going offline on May 31. Electronic Arts is also affected, and has pledged to find other means to keep old Battlefield games alive after May 31.