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Huh, haven't seen splitscreen in a while. Would there be a way to do splitscreen across two monitors instead of down the middle of one easily?

Interesting point. It should be possible without issues if both screens use the same resolution - you could just use borderless windowed mode for the game and double the width. I am not sure how it could be solved in other cases though. I know that Battlefield 4 uses second screen as the map by default, but I think it's rather advanced programming magic :D