This software update is known as Grand Theft Auto 4 Patch 1.0.2.0. It fixes several bugs and issues within the game and includes improvements related to gameplay stability and performance. It also allows for better compatibility with operating systems like Windows 7 and improves online multiplayer features.

With Patch 1, there is now direct input device support, which is disabled by default but can be enabled with the command line. The Logitech Dual Action, Logitech RumblePad 2, Logitech Cordless RumblePad 2, and Saitek P2500 controllers are now supported. Additionally, the Logitech G25 Racing Wheel, Logitech Wingman Formula GP Wheel, Logitech MOMO Racing, MOMO Force, Driving Force Pro, Driving Force, and Formula Force wheels are now compatible. A new command line "-notimefix" has been added to help users experiencing fast/slow gameplay issues after Patch 1.
Some bugs have been fixed as well. Users experiencing endless looping audio effects after Patch 1 can now rest easy, as this has been resolved. Benchmark disabling sounds after Patch 1 has also been fixed. There are also several crash fixes, including the inability to load the game, hang on the initial game loading screen, and certain instances of the "GRAND THEFT AUTO IV has encountered a problem and needs to close" error.
The video editor has been updated, and now mandatory clip naming on export has been implemented. For multiplayer matches, legitimate players being kicked out have been resolved. Lastly, there are general additions and fixes, such as wireless 360 controllers now functioning correctly and new options in the game section accessible from the title screen, including clip capture on/off. Overall, this software review highlights the improvements made to this popular game, making it more enjoyable for players.
Version 1.0.2.0: Patch