Playing in a full fantasy world is fine. But what if you want to play in something a bit closer to Earth, but with a twist? That's what Historica Arcanum lets you do, creating alternative history settings. The City of Cresent book gives both players and DMs lots of new items they can incorporate into their games. From a fantasy-historical setting to new professions for players to complete adventures and quests they can go on. The book is up on Kickstarter now.
From the campaign:
The campaign's making its way to 2x funded with 29 days left to go.