Latest patch is 1.05. Go here and select the right one for your game edition.
Note that the Steam version is already patched to 1.05.
The unofficial map pack adds 41 new maps to the game. MR.MIC's Map Pack is also included, bringing the total map count to 56.
Download the map pack!
Use the -nointro command line argument.
FullscreenViewportX= (line 98)
FullscreenViewportY= (line 99)
%PROGRAMDATA%\Ubisoft\Tom Clancy's Splinter Cell Chaos Theory\Saved Games\Versus\<user-id>_prf.ini
There are issues using Alt+Tab ↹ in fullscreen mode. If used too many times, it will disconnect players connected to your server and can even crash the game.
Unfortunately, Ubisoft's netcode only supports a max of 30 frames per second for proper sync between players in multiplayer. Bypassing this limit results in things such as co-op actions not executing properly, and so on.
Edit: You can download this program from fans called Framer and unlocks the frames on Multiplayer, Download:http://steamcommunity.com/sharedfiles/filedetails/?id=265715221
There is an issue for some users happening at random after a couple of minutes where the game disconnects both players while playing the co-op campaign. The issue can be encountered 100% during the training mission while hacking the first laptop the players come across. In subsequent missions it seems to happen randomly after some time. No real fixes have been reported that work for everyone. For some completely uninstalling NOD32 solved the problem.
Splinter Cell: Chaos Theory's Versus mode has some problems rendering certain lighting effects on modern machines. This problem makes it very difficult to play properly. Certain shadows may not render, and mercenaries' flashlights don't work, severely impairing gameplay. Follow the steps below to fix these issues:
C:\Program Files (x86)\3D-Analyze\3DAnalyze.exe" /EXE=C:\Program Files (x86)\Ubisoft\Tom Clancy's Splinter Cell Chaos Theory\Versus\System\SCCT_Versus.ex
If you have a multi-core CPU and Versus seems to run in slow motion, fix this issue by following the instructions below.