The PC Port of TLOU1 is an absolute shitshow. Players have reported low frame rates, high CPU usage, texture issues, and even game crashes. Apparently, the PC port of the game was done by Iron Galaxy, which was also the ones that did the infamous Arkham Knights PC port. Also, it takes hours for the "Building Shaders" option, which seems to have been suspiciously added, to make players play the game for long enough to not be eligible for Steam refunds of the game.
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The port was so poorly done, that even 3060 Tis struggle to maintain a good frame rate:
The game was also cracked Day 1, since the game doesn't have any DRM on it:
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Apparently, in addition to Iron Galaxy doing the PC port, the game has a version of Oodle Decompression Library that has a VRAM memory leak. (Version 2.9.6) Some players have reported that either installing the version 2.9.5, or newer, DLL, seems to improve the frame rate noticeably. However, some people still have reported extremely high CPU usage, and game crashes, even after doing that fix.
And Naughty Dog apparently claimed to only know about these issues now, despite the game's release being 3 weeks delayed:
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