Yea the graphics on the game are amazing, my video card is too under par for me to play it at this time but I gave it a try
Technically they say stealth is optional as you can just kill everything or sneak thru
Stealth on some modes is actually quite easy as there are shadows in almost all areas and all you need to do really is run to a dark spot and crouch, insta hidden lol
There are also hiding spots thrown in around which enemies won't search but I believe you can kill someone walking past from inside it
I believe they said there is actually an achievement for beating the game without ever being seen by an enemy
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