@ResonanceCascade:
My question is:
How is stealth in FPS possible?Even with lean and an AI similar to DX:HR,you will be easily spotted.
It all depends on what abilities you're given. DXHR keeps those short in favour of a well developed 3rd person cover system. Sound is the element you make use of, you don't see, but you can hear if someone moves by close, you pay attention to shadows, make use of darkness. Leaning works, believe it or not.
3rd person cover system stealth is a weaker and more accessible stealth. You think less, you simply ghost-spy over corners. I loved the older Splinter Cell games, but a real stealth game is 1st person!
how does smaller FOV give headaches? Since when does it utilize fancy tech such as 3D?
I don't know about console players, but many PC players have problems with a narrow field of view, myself included. Reason for me is that a smaller FOV is basically like your view is zoomed in all the time, regardless of mouse sensitivity you need to move the mouse more in order to keep awareness and the objects on your screen are moving at a fast speed if you sway your view around (because they are so close), which stresses the eyes and can cause headache and dizziness.
A wider FOV on the other hand allows you to view a larger piece of environment without moving the mouse and if you have to look to the sides, you don't require a lot of mouse movement and objects on the screen are not flying through your view at such rapid speed. Less mouse pushing, more steady view, less rapid events on your screen, all this is much more calming to the eyes.
Needless to say that a 1st person stealth game benefits from a wider field of view for awareness sake and orientation. A wider field of view means more control and control is what we PC players like to have in our games.
Of course, the disadvantage of a wider FOV is that objects at the distance are smaller and less detailed, as a compromise, games that require you to deal with distances allow you to zoom in, in order to aim or simply focus. I don't like zoom, but I accept, or even welcome it as a compromize, because it is a benefit if you can focus on very distant objects when aiming or simply looking, but if you need to look around and examine the closer environment you simply zoom out again.
The game Thief has a good FOV and allows you to zoom, but I never even used the zoom, so at least to me the wider FOV is nothing but an advantage.