Taken from pcgamer.com...
As we reported last week, online matchmaking client GameSpy will shutdown on May 31. The community at Reddit's /r/Games is compiling a list of games that will be affected, partially affected, or not affected at all. The list is not official by any means, as most publishers have yet to make official comments about the shutdown, and most games have yet to be confirmed one way or another. But it’s still a pretty terrifying list.
Here are just some of the possibly affected games that stood out to me:
Battlefield 1942
Battlefield 2
Battlefield 2142
Battlefield Bad Company 2
Borderlands
Civilization III
Civilization IV
Crysis
Halo: Combat Evolved
There are many more, which you can find on the full list. As with the upcoming Games for Windows Live shutdown, it's down to individual publishers as to whether they want to update their games with new server technology.
Activision and Capcom said that this will not affect their games, and Bohemia explained that Arma 2: Operation Arrowhead and Arma 3 will migrate to Steamworks, while some of its other games will now have a “more limited multiplayer experience.” The Company of Heroes games, which appears on that list as “affected,” actually migrated to Steamworks last year.
A couple of the big question marks here are 2K (Borderlands) and Electronic Arts. These publishers (and others) have yet to release official statements. Until they do, the fate of these games remains uncertain.
Source : Reddit compiles terrifying list of games affected by GameSpy shutdown
The full list of games are :
Affected
Arma
Arma: Cold War Assault
Arma 2
Arma 2: Free
Borderlands
Dungeon Defenders [PS3/Non-Steam]
Halo: Combat Evolved
Saints Row 2
Star Wars Battlefront
Star Wars Battlefront 2
Stronghold 2
Stronghold Legends
Take On Helicopters
Status Unknown
Alien vs Predator (Classic)
Alien vs Predator 2
Battlefield 1942
Battlefield 2
Battlefield 2142
Battlefield Bad Company 2
Battlefield Vietnam
Call of Juarez
Call of Juarez Bound in Blood
Civilization III
Civilization IV
Commandos 2
Commandos 3
Commandos: Behind Enemy Lines
Commandos: Behind the Call of Duty
Crysis
Crysis Warhead
Crysis Wars
Far Cry
Hexen
Hexen 2
Jagged Alliance
Jagged Alliance 2
Medal of Honor: Pacific Assault
Medal of Honor: Allied Assault
Medieval Total War
Medieval Total War 2
Multiwinia
Need For Speed: Hot Pursuit
Need For Speed: Hot Pursuit 2
Postal 2
Quake 2
Quake 3
Quake 4
Red Dead Redemption
Shogun Total War
Soldier of Fortune
Soldier of Fortune 2
SWAT 2
SWAT 3
SWAT 4
Titan Quest
Tom Clancy's Ghost Recon
Tom Clancy's Ghost Recon Advanced Warfighter
Tom Clancy's Ghost Recon Advanced Warfighter 2
Tom Clancy's HAWX
Tom Clancy's Splinter Cell Chaos Theory
Tom Clancy's Splinter Cell Double Agent
Two Worlds
Two Worlds 2
Warhammer 40K: Dawn of War
Warhammer 40K: Dark Crusade
Warhammer 40K: Soulstorm
Warhammer 40K: Winter Assault
Probably Unaffected
Call of Duty
Call of Duty United Offense
Call of Duty 2
Unreal Tournament
Unreal Gold
Unreal 2
Unaffected
Arma 2: Operation Arrowhead
Arma 3
Company of Heroes
Street Fighter 3: 3rd Strike Online Edition
Stronghold HD
Stronghold Crusader HD
Source : List of games affected by GameSpy shutdown
So if there are any games in this list that you still play regularly online, I'd suggest you get in as much play time as possible before 31st of May. I admit, a vast majority of these games I don't play... but I do have a fondness for Saints Row 2. Guess I'll fire that up one more time...