While the cyberpunk style tends to be thought of as fairly one note, the differences between Observer and Transistor show that doesn't have to be the case. Despite featuring a totally different color scheme, protagonist, and gameplay style, both are still firmly in the cyberpunk realm.
This is the second main entry from indie darlings Supergiant Games, and sadly many of their later titles haven't been quite as well received as the debut Bastion (the odd football combat mechanics in Pyre didn't do it for me, to be honest).
Transistor still absolutely has the goods though, featuring more options on the combat front, and just as high quality of a soundtrack as its predecessor. Although the sci-fi story is told in a non-traditional (and occasionally obtuse) manner, the journey here is well worth taking from beginning to end.