Since I hate it when I ask for critiques and get none, I decided to try my hand at this!
Ok, so this shows Garrus in black and red instead of blue and red, I suppose to signify that he is now a Spectre. I like the idea and the coloring was done decently, but the picture is a bit dark and could use some lightening as well as more of a main focal point because my eyes don't know where to look first. It also feels a bit busy and it seems like instead of the words being blue and white, they should be with a sort of red or black glow. Also, it seems some blue still remains on Garrus' earpiece in the picture on the upper right.
Still though, the blending was done really smoothly, the coloring was done nicely and you can barely tell what shots come from what game because they are all so uniform. The whole picture just blends really well, including the backgrounds of each picture.