The PC version of Tomb Raider has been patched and Steam will download it for you. There was an issue the old patch added to the game which has been fixed in this patch.
Here are the list of fixes:
-Resolved a problem where mouse control in the base camp upgrade screen would not work properly since build 742.0.
-Stereo3D parameters for strength and depth can now be modified in the registry beyond their normal in-game range again.
-GPU performance improvements, specifically at higher quality levels.
People running the game on a Nvidia card received a warning: “Unfortunately we do not yet have a resolution for the players that are experiencing crashes and major graphical corruption on NVIDIA hardware. Some progress has been made though, and we expect hope to have an update soon.”
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