OP 14 January, 2020 - 12:39 AM
Rockstar has confirmed that the reason Grand Theft Auto IV is no longer available to purchase from Steam is its reliance on the Games for Windows Live (GFWL) platform, which it says Microsoft is “no longer supporting.” Although people who already own the game on Steam can continue to play it, the game’s “Add to Cart” button has disappeared from its Steam page, preventing users from buying a new copy.