Though it's not on the Grand Theft Auto IV Title Update Page, a new version 1.0.6.0 patch for the Games for Windows edition of Grand Theft Auto IV is now available to accompany today's release of Grand Theft Auto: Episodes From Liberty City. The patch is available from ActionTrip, AtomicGamer, FileFront, and WorthPlaying. Also, Steam now has an automatic update for the Steam-powered version of the open-world action game. Among other things, after applying the patch, the Rockstar Games Social Club application is no longer required to launch the game. The patch notes follow.

• Rockstar Games Social Club
  • Remove Rockstar Games Social Club application
  • Separate RGSC application no longer required to launch game
  • Social Club login now occurs during the launch process
• Shadows
  • A new, less memory-intensive, and better-looking scalable shadow solution has been implemented
  • Enhanced Night Shadows added with user-selectable level of detail (replaces Shadow Density)
• Performance
  • Rendering optimizations have been made to improve performance, particularly when enabling shadows
  • User-configurable graphics settings have been added for shadow control
  • Improved memory management
• Multiplayer
  • Enhanced security to isolate users from cheaters and hackers
• Episodic Content
  • Provide in-game support to purchase "The Lost and Damned" and "The Ballad of Gay Tony" (Not available in Russian/Japanese Versions)
• Bug Fixes
  • Vehicle shadows re-enabled between 8pm and 6am
  • Fix floating street textures
  • Pedestrians in vehicles appear further out from the player to allow for long range sniping
  • The Moon has been implemented with simulated lunar phases
  • Fixed garbled text in Japanese Multiplayer menus
  • "RESC 10" error fix for specific hardware configurations