A new replay editor will allow players to edit and save the last 30 seconds of gameplay. Filters, cutting, and camera angles will be supported. The separate 30-second clips can then be edited together into a longer work using the "montage editor." The complete work can then be shared on the Rockstar Social Club.
The game will also receive some changes to its multiplayer modes. Though few details have been released on this point, it was hinted that the overall player count--Grand Theft Auto 4 supported 16 player servers--may be increased for the PC edition. Confirmed are a robust set of server filters, which will enable users to find matches with specific settings much easier.
The graphics engine has also been improved, with more realistic lighting and a higher level of character and environment detail, according to Eurogamer. Resolutions up to 2560x1600 will be supported.
Grand Theft Auto 4 is set to hit PC on November 18.
I second that concurrence. For me, stealing that Infernus racer and burning through an empty Main Street in the sunrise for the first time, it will almost be greater than a Chie Sakamachi "ten-gun salute". Almost.