GFWL Caused GTA4 Steam Delisting

There's a statement from Rockstar on USgamer explaining the disappearance of Grand Theft Auto IV from Steam. GFWL met its demise several years ago, but apparently Microsoft's online service has reached out from the grave to strangle the game's Steam release with its icy fingers. Here's word:
"Grand Theft Auto 4 was originally created for the Games For Windows Live platform," reads the statement. "With Microsoft no longer supporting Games For Windows Live, it is no longer possible to generate the additional keys needed to continue selling the current version of the game. We are looking at other options for distributing GTA4 for PC and will share more information as soon as we can."