How can you have a Victorian era game and not reference steampunk in any way? Assassin's Creed's first Season Pass DLC does exactly that.
The first high end gear pack has much to do. Weirdly, you have to download Evie's suit seperately, but that's as strange as it gets. The suits increase your Voltaic Bombs power. Both look pretty good, Jacobs suit looks a bit nicer. Both suits have a patch on electricity on the shoulder, while Jacob gets some intersting googles to wear.
Complete the look with a belt, gauntlet and gun to get lots of bonuses to damage, damage resistance and Voltaic damage. Mind you, you do have to be level 7 to use it, so if you are just starting out don't expect to use it before Sequence 5 or having cleared a few boroughs of London.