I noticed a post on Steam's forum that mentions graphics card vsync settings can fix the screen tearing. For Radeon (I have a R9 390 but I think the drivers are the same for all or at least many of the cards) I found that just forcing vsync didn't fix the issue. Enabling "Radeon Enhanced Sync" removes the tearing, however there is a bit of a jarring screen movement at least at times where there would be tearing. Also enabling "Radeon Anti-Lag" reduces the jarring screen movement quite a bit, so I'd recommend giving both settings a try. They might even be on by default if you haven't changed anything in driver settings, although I recommend turning off a bunch of those driver "enhancements" by default since they can cause issues with some games; you can change settings for particular games under the games tab of the driver utility. I'm guessing Nvidia has similar settings that can help. I haven't played too long with these settings (the tearing didn't bother me until I went back to look at a few things again after finishing) so possibly they could cause other issues, but worth a try if the screen tearing bothers you.

I just bought the game and also realized that it has no v-sync by default. The simple solution is to simply force it on in the NVCP or however it's done for Radeon. The reason that others still experience stutter and tearing after forcing vsync is because of mismatched refresh rate. One must absolutely run this game at 60hz...no fps limiting....with v-sync forced. Smooth as butter here.

Thanks for the info. The Radeon driver is saying that it is getting about 55 fps average on my system so I guess that is why vsync alone doesn't do it for me. Luckily with the driver options I mentioned there is barely any issue. Hopefully it will get some optimization and the last few bugs fixed at some point since it is a wonderful game, one of my favorites.