I guess my name is Sorck... though I'm not entirely sure.
Steam & UPlay games include: (both lists because some span them both)
All of the main Assassin's Creed line up to and including Unity
Star Trek Online
Dawn of War
Star Trek Voyager Elite Force
NB: I'm not sure which are multiplayer.
Though I've only included games that I think might be multiplayer or, in a few cases, that I know are multiplayer.