The PC version of Tony Hawk's Pro Skater 4 only officially supports 4:3 fullscreen mode; the console versions, however, had 16:9 support. This was an in-game menu option in the PlayStation 2 and GameCube versions, but on the Xbox version, it was a system-level setting. Since the PC version was ported from the Xbox versions, the menu option is not there; however, with some hex editing, it is possible to access it.
Note that this does not change the resolution of the game; the game will still only run in a resolution of 640x480, 800x600, 1024x768, or 1280x1024. To run the game in widescreen mode, you will need a 16:9 monitor that can stretch an image from one of those resolutions to 16:9.
Also note that this only changes the horizontal FOV. On-screen text, HUD elements, menus and FMVs will appear stretched. This is also the case in the PlayStation 2 and GameCube versions.
Finally, note that this will result in you being unable to access the "Adjust Gamma" menu.
- Open the
C:\Program Files (x86)\Aspyr\Tony Hawks Pro Skater 4\Game\data\scripts\folder in your THPS4 install folder. - There should be a gamemenu.qb file in this folder. WARNING: Back this file up before making any changes.
- Open the file up in a hex editor such as XVI32.
- Find the hex string 41646A7573742047616D6D61 ("Adjust Gamma")
- Shortly before that, there should be an occurrence of the hex string 8A83D786. Replace it with 4901414C.
- Find the first of two occurrences of the hex string 5374616E6461726420343A33 ("Standard 4:3").
- Shortly before that, there should be an occurrence of the hex string 4901414C. Replace it with 8A83D786.
- Launch THPS4 and enter any level (except practice mode).
- Pause the game and select "Options", then "Screen Mode", then "Widescreen 16:9".
- You will need to repeat the last two steps every time you launch the game.
A new way to make coexist both adjust gamma and widescreen option is possibly explained here