We got word that Rockstar has released a patch for the PC version of Grand Theft Auto IV. This patch fixes performance, control and graphic issues.
Graphics * Interior Lights for ATI 1900 series cards o All light sources appear for users with 1900 series ATI cards. (ie. Pool Mini Game) o ALT-TAB fixed * Graphics Settings o Added menu option "OFF" for Reflection quality o Added menu option "OFF" for Shadow quality * Scrolling signboards o Activate missing scrolling signboard text (ie. highway signs, Star Junction, Clock Tower Sign) Performance * Physics optimizations to improve situations with heavy physics calculations (ie. 32 player races) * Graphical Performance Optimizations Multiplayer * NAT Type detection o Detect if user has a "strict" NAT and displays message for user * Voice chat is received even if your microphone is turned off Controls * Keyboard / Mouse o Remapping restrictions removed o Allow Enter, Backspace, and Arrow keys to be remapped by user o Allow multiple mouse buttons to be mapped * Enable/Disable DirectInput in Menu o Users can now activate/deactivate Direct Input devices from "Controls" menu o If commandline "-usedirectinput" is active, it will override pause menu setting * Use 2 direct input devices simultaneously (ie. Wheel and Gamepad) o Users can now use 2 different controllers at once, including 1 XInput and 1 Direct Input device * Added more Direct Input / XInput device support o Saitek P380/P480/P580/P990 o Saitek PS1000/PS2700/P3200/P3600 o Gravis Eliminator Shock gamepad Security * Detect modified files and prevent users from entering multiplayer if found o Game will prompt with a message after blocking user with modified data files from entering multiplayer o Should prevent multiplayer access from cell phone and GFWL join in progress * Detect modified / non-original game launcher o Prevent game from Launching if modifed/non-original game launcher is found