GTA IV suddenly disappeared from Steam in January due to the old Games for Windows Live platform becoming unavailable.
Today, Rockstar Games provided an update on the GTA IV Steam page, announcing that next month the game will become available again. However, multiplayer modes had to be cut since they were based on Games for Windows Live.
Below you'll find a detailed FAQ on exactly what's happening.
Current game save files will be compatible with Grand Theft Auto IV: Complete Edition.
As a result of this update the following services will no longer be available in Grand Theft Auto IV: Complete Edition:
Games for Windows LiveMultiplayer modeLeaderboardsThe following Radio Stations will be temporarily unavailable in Grand Theft Auto IV: Complete Edition
RamJam FM, Self-Actualization FM, and Vice City FM (previously available in Grand Theft Auto: Episodes from Liberty City)
Grand Theft Auto: Episodes from Liberty City will be removed and replaced with GTAIV: Complete Edition in the launcher library. Update file size is expected to be approximately 22GBGrand Theft Auto IV owners will download content from Grand Theft Auto: Episodes from Liberty City and their game will update to GTAIV: Complete Edition. Update file size is expected to be approximately 6GB