So, mainly thinking of usability improvements. See Fallout New Vegas, which had iron sights. Sure you wouldn't have the code (in a universe where Fallout 3 was

So, mainly thinking of usability improvements. See Fallout New Vegas, which had iron sights. Sure you wouldn't have the code (in a universe where Fallout 3 was open source), but you would know how it works by treating it as a black box.