Some games go insane when trying to deal with a vertical display. Use something like this to make them behave and go fullscreen: https://github.com/Blinue/Magpie/
NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.
1920x1080 VN's - crime mystery, drama, supernatural romance and such
1 project | reddit.com/r/visualnovels | 1 Jul 2022
Why is the vn laggy in full screen?
1 project | reddit.com/r/visualnovels | 19 Jun 2022
How to Improve the image quality on PC using AMD's FSR.
1 project | reddit.com/r/DiabloImmortal | 4 Jun 2022
Is RSR currently available for my RX580 GPU?
1 project | reddit.com/r/Amd | 28 May 2022
You can use FSR in almost any game with Magpie - Upscale a game to 4K from 1920 or 2560 without (much) quality difference
1 project | reddit.com/r/gaming | 21 May 2022