Official GTAIV Patch 1.0.6.0

Note: Not cracked yet.

Patch 6 (1.0.6.0) Change log:

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