Just picked up your great game and being that you use the unreal engine, us multi monitor users usually get done over - and unfortunately this is the case with your beautiful game ( which by the way would look glorious across 3 screens). I use Nvidia Surround @ 5760x1080 and this is what I get when I load up your game.
1. No ultra wide resolution choices in the menu - only 1920x1080.
2. When I force my resoultion via .ini edit I get a vert- imagine, but the game screen letterboxing the side monitors and is confined to the middle screen, and the menu if spanned/zoomed (vert- part) or.
Have a look at my screen shots and hopefully you can do some magic to make it work.http://steamcommunity.com/sharedfiles/filedetails/?id=169950635
normal game 120 FOVhttp://steamcommunity.com/sharedfiles/filedetails/?id=169949338
startup - force 5760@1080 .ini - as you can see a glitch also occurs with the floating text ehind dreamhttp://steamcommunity.com/sharedfiles/filedetails/?id=169952245
Main game - letterboxing on sides - if you look bottom left you can just make out the Items menu (vert-)