In the last few weeks, Activision has announced a number of games that will no longer be supported by their game servers, including some Transformers games, which means multi-player portions of those console games are no longer playable (for some of these games, it is a significant portion that is now unplayable).

In February the Dark of the Moon game was in their listing.
Last week, the Revenge of the Fallen and Fall of Cybertron games were in their listing.

Fall of Cybertron had some really good multiplayer games on it, so I'll miss that one... but I never got to play the online games for the two Movie games.
When we lose access to the War For Cybertron multiplayer games (if not already), I'll be really sad, as they had some of my favourites.