Halo 4 forerunner style,
Impropper use of lighting (light from the blackness of space. Realy?)
https://s3cmsassets.blob.core.windows.net/media/Default/games/halo-the-master-chief-collection/screenshots/E3-2014/Remastered/e3-2014-halo-2-anniversary-comparison---recreation---remastered-627e2925671d4c94976218afee266981.jpg[/img
Not only is the lighting wrong, the colours are wrong and oversaturated and the forrunner stuff is of course 343 halo 4 stuff rather than the correct bungie stuff. : the geometry is different (forrunner stuff but also the rocks) which will clearly affect stuff like grenade bouncing and what we see as cover.