Western. With orcs and goblins and dwarves. Maybe elves. You could be a dwarf in a duster coat carrying a shotgun and an ax or broadsword. Of course a hat as well. Could probably throw humans in as well.
You could mine for gold and even look for oil.
Spend your money in the towns and saloons, maybe get into bar fights with nasty outlaw orcs.
The saloons could even be ran by wizards and sell special potions.
Become proficient at using rifles, enchanted six shooters, swords, and maybe even horse riding.
Elves could possibly be the indian type characters.
Halflings could run the banks where you store your gold and trade for currency. The bank could possibly be robbed and you could hunt down the robbers to get your gold back. Maybe give the bank the rest of it back too or keep it for yourself.
Spend the night in a cat house to regain health and build your stamina. Maybe experience.
You could roam around and decide for yourself if you want to rob caravans, help those in need, or even maybe just be a working dwarf by mining or even farming maybe?
Fight off rattle snakes and demon cows/bulls, Carnivorous tumble weeds, and town drunks.
Maybe even rob a train. Or get ran over by one.
Mines would be the dungeons.
I think this could be a fun and bit unique setting for a free-roaming kind of roguelike.