The easiest way to hide the hud is the command <togglehud>. Entering like this in the Console will hide the HUD until you retype the command.

Press TAB to open the console.

For FOV it's pretty much the same.
fov <x>

The other way is to configurate the ScourgeInput.ini which you can do with the console too.

for example

setbind <key> <command> Binds the specified command to the specified key
setbind h togglehud

if you wanna check what the console has done, go to..

..\Documents\MyGames\Scourge Outbreak\ScourgeGame\Config\ScourgeInput.ini

...
[Configuration]

[ScourgeGame.ScPlayerInput]
...
Bindings=("Name"="H",Command="togglehud",Control=False,Shift=False,Alt=False,bIgnoreCtrl=False,bIgnoreShift=False,bIgnoreAlt=False)

Command for console:

fov <x> Changes Field of View to the specified degrees

or

setbind <key> fov <x>

setbind m fov 120
setbind l fov 80
and so on...


You'll need some tries because a lot of keys are in use...THX