DSOGaming writes: "After addressing the Ranger Mode DLC issue, 4A Games and Deep Silver decided to shed some light on why Metro: Last Light does not feature any FOV slider. According to the devs themselves, a Field Of View slider is not ‘as simple a thing to implement as it might appear‘."
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Why exactly would you want to change it anyway?
"Good news is that with the upcoming update, 4A Games will give PC gamers the ability to change the FOV via the game’s cfg files. However, this workaround may trigger a number of issues listed above. Still, it’s better than nothing, so kudos to 4A Games for at least doing that."
These complaints are entirely because they didn't develop it with different fields of view in mind, not that including variable FoV adds tremendous amounts of workload if you are keeping it in mind during the development process.
It is if you do it right from the beginning. If your game isn't set up to support it and you try to add it later then obviously it will cause problems. Solution is just do it from the start. As PC devs they should have known better.
If FOV is that thing I seen in Black ops 2 last weekend when it was free then that should be in every shooter. You can see alot more of the enviroment and less gun. I do not require it but it is a nice feature in fps.