Had this problem over 18 months ago when I first bought SOT, it bugged me for months before I uninstalled the game, installed it again only to find it's still an issue and many people have been complaining about it on the forums for 2 years now.
For some reason (only in SOT) my game is locked to 60fps in fullscreen mode, If i change the resolution to 900p (I have a 1080p moniter) it caps the fps at around 140-150, and if I change the mode to windowed it also uncaps the fps. The second I put it back on fullscreen it caps back to 60fps.
All my settings in Nvidia are uncapped, vsync is off, monitor refresh rate set to 144hz , it's literally the only game with this issue.
Any suggestions on how to sort this out? I have suspicions that SOT is taking information from my 2nd monitor which is 1080p 60hz, even though the game literally opens and runs on my 144hz monitor, I'm not going to unclone my monitor everytime I want to play SOT since I use my 2nd monitor whilst playing the game.
Anyone else resolved this issue? 2 years on and it's still a problem for people.