Steampunk

Steampunk is a science-fiction style created as a alternate history during the 19th century when steam was the predominate form of energy. It has been used in lots of different designs from concept art to fashion.

Steampunk is a really good style to make a robot really look like a like it is powered by itself. The movement of my bot must be quite clunky but deliberately clunky as if it is heavy and has come from the 1855.

I have a choice as steampunk style tends to be either American "Wild West" or British Victorian era. Both are very gritty but have the potential to be very different.