I've been playing this on the hd collection for a few hours now and man I don't know what it is but I cannot get the hang of the stealth, especially where I am now. I am at the part where I need to kill 8 enemies so EVA can escape, and every single time I am spotted within the first 2 minutes. I'm constantly using the cameo to blend as best I can and even when its at 90% they still seem to see me. I tend to try and use the CQC as much as possible to save the silencer and ammo. Any tips or tricks would be awesome.