Mass Effect Aliens: Turian, Asari, Quarian, Krogan HD Wallpaper

Four alien heads are shown in profile against solid color backgrounds. From left to right, they are a green-skinned alien with a segmented head, a blue-skinned alien with fin-like head crests, a figure in a purple hooded suit with swirling patterns, and a red-skinned alien with sharp facial features and horns.