So, as was promised in this thread, here is A Society of Unlikely Gentlemen

This is the year 1895. Five years ago, the city of Atlantis rose again from the depths of the ocean. At the same time, several portals appeared on Earth and allowed safe passage to Venus and Mars. [...] Scientific marvels pop-up everywhere, four-armed martian ambassadors walk the streets of London while Venusian amazons guide big game hunters through the jungles of their planet. Empires still scheme and fight among themselves.

Bottom line, no fantasy, no magic, but it is a bit over the top, you can play a steam cyborg, a thawed-out viking warrior from the past, Jekyll's heir or, basically, whatever crosses your mind. One of my players described it as "The adventures of Captain Future in the 19th century".

You can download the game here !